642305158520 has 32 divisors (see below), whose sum is σ = 1508020809120. Its totient is φ = 245751538560.

The previous prime is 642305158507. The next prime is 642305158529. The reversal of 642305158520 is 25851503246.

It is a super-2 number, since 2×642305158520² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642305158529) 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, 349077971 + ... + 349079810.

It is an arithmetic number, because the mean of its divisors is an integer number (47125650285).

Almost surely, 2^642305158520 is an apocalyptic number.

It is an amenable number.

642305158520 is an abundant number, since it is smaller than the sum of its proper divisors (865715650600).

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

642305158520 is a wasteful number, since it uses less digits than its factorization.

642305158520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698157815 (or 698157811 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 642305158520 in words is "six hundred forty-two billion, three hundred five million, one hundred fifty-eight thousand, five hundred twenty".