642598568976 has 320 divisors, whose sum is σ = 2181780357120. Its totient is φ = 158353090560.

The previous prime is 642598568933. The next prime is 642598568999. The reversal of 642598568976 is 679865895246.

It is a junction number, because it is equal to n+sod(n) for n = 642598568898 and 642598568907.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3845011 + ... + 4008653.

It is an arithmetic number, because the mean of its divisors is an integer number (6818063616).

Almost surely, 2^642598568976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642598568976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1090890178560).

642598568976 is an abundant number, since it is smaller than the sum of its proper divisors (1539181788144).

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

642598568976 is a wasteful number, since it uses less digits than its factorization.

642598568976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163734 (or 163728 counting only the distinct ones).

The product of its digits is 1567641600, while the sum is 75.

The spelling of 642598568976 in words is "six hundred forty-two billion, five hundred ninety-eight million, five hundred sixty-eight thousand, nine hundred seventy-six".