1642317920520 has 64 divisors (see below), whose sum is σ = 4945269672000. Its totient is φ = 436323364608.

The previous prime is 1642317920501. The next prime is 1642317920561. The reversal of 1642317920520 is 250297132461.

It is a happy number.

It is a super-2 number, since 2×1642317920520² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25406350 + ... + 25470909.

It is an arithmetic number, because the mean of its divisors is an integer number (77269838625).

Almost surely, 2^{1642317920520} is an apocalyptic number.

1642317920520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642317920520 is an abundant number, since it is smaller than the sum of its proper divisors (3302951751480).

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

1642317920520 is a wasteful number, since it uses less digits than its factorization.

1642317920520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50877542 (or 50877538 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 1642317920520 in words is "one trillion, six hundred forty-two billion, three hundred seventeen million, nine hundred twenty thousand, five hundred twenty".