642917496 has 64 divisors (see below), whose sum is σ = 1755371520. Its totient is φ = 195027840.

The previous prime is 642917489. The next prime is 642917531. The reversal of 642917496 is 694719246.

It is a happy number.

It is a congruent number.

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, 7641 + ... + 36663.

It is an arithmetic number, because the mean of its divisors is an integer number (27427680).

Almost surely, 2^642917496 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 642917496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (877685760).

642917496 is an abundant number, since it is smaller than the sum of its proper divisors (1112454024).

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

642917496 is a wasteful number, since it uses less digits than its factorization.

642917496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29116 (or 29112 counting only the distinct ones).

The product of its digits is 653184, while the sum is 48.

The square root of 642917496 is about 25355.8177939502. The cubic root of 642917496 is about 863.0813817674.

The spelling of 642917496 in words is "six hundred forty-two million, nine hundred seventeen thousand, four hundred ninety-six".