4172640520 has 32 divisors (see below), whose sum is σ = 9617431320. Its totient is φ = 1628346880.

The previous prime is 4172640503. The next prime is 4172640569. The reversal of 4172640520 is 250462714.

It can be written as a sum of positive squares in 4 ways, for example, as 3066279876 + 1106360644 = 55374^2 + 33262^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270507 + ... + 1273786.

Almost surely, 2^4172640520 is an apocalyptic number.

4172640520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4172640520 is an abundant number, since it is smaller than the sum of its proper divisors (5444790800).

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

4172640520 is a wasteful number, since it uses less digits than its factorization.

4172640520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544345 (or 2544341 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 4172640520 is about 64595.9791318314. The cubic root of 4172640520 is about 1609.9176327086.

The spelling of 4172640520 in words is "four billion, one hundred seventy-two million, six hundred forty thousand, five hundred twenty".