4155847640 has 32 divisors (see below), whose sum is σ = 10686466080. Its totient is φ = 1424861952.

The previous prime is 4155847571. The next prime is 4155847643. The reversal of 4155847640 is 467485514.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 4155847591 and 4155847600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4155847643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7420877 + ... + 7421436.

It is an arithmetic number, because the mean of its divisors is an integer number (333952065).

Almost surely, 2^4155847640 is an apocalyptic number.

4155847640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4155847640 is an abundant number, since it is smaller than the sum of its proper divisors (6530618440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4155847640 is a wasteful number, since it uses less digits than its factorization.

4155847640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14842331 (or 14842327 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 44.

The square root of 4155847640 is about 64465.8641452979. The cubic root of 4155847640 is about 1607.7550130882.

It can be divided in two parts, 41558 and 47640, that added together give a palindrome (89198).

The spelling of 4155847640 in words is "four billion, one hundred fifty-five million, eight hundred forty-seven thousand, six hundred forty".