402950726656 has 99 divisors (see below), whose sum is σ = 818755483891. Its totient is φ = 198215112704.

The previous prime is 402950726641. The next prime is 402950726687. The reversal of 402950726656 is 656627059204.

The square root of 402950726656 is 634784.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×402950726656² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1685986185 + ... + 1685986423.

Almost surely, 2^402950726656 is an apocalyptic number.

402950726656 is the 634784-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402950726656

402950726656 is an abundant number, since it is smaller than the sum of its proper divisors (415804757235).

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

402950726656 is an frugal number, since it uses more digits than its factorization.

402950726656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 402950726656 in words is "four hundred two billion, nine hundred fifty million, seven hundred twenty-six thousand, six hundred fifty-six".