642502321315536 has 80 divisors (see below), whose sum is σ = 1828615967748288. Its totient is φ = 192769973376000.

The previous prime is 642502321315513. The next prime is 642502321315537. The reversal of 642502321315536 is 635513123205246.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642502321315537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6024008341 + ... + 6024114996.

Almost surely, 2^{642502321315536} is an apocalyptic number.

642502321315536 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

642502321315536 is an abundant number, since it is smaller than the sum of its proper divisors (1186113646432752).

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

642502321315536 is a wasteful number, since it uses less digits than its factorization.

642502321315536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12048123460 (or 12048123454 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 48.

The spelling of 642502321315536 in words is "six hundred forty-two trillion, five hundred two billion, three hundred twenty-one million, three hundred fifteen thousand, five hundred thirty-six".