78902252697636 has 135 divisors (see below), whose sum is σ = 210253898567713. Its totient is φ = 25801738915680.

The previous prime is 78902252697607. The next prime is 78902252697641. The reversal of 78902252697636 is 63679625220987.

It is a happy number.

The square root of 78902252697636 is 8882694.

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

78902252697636 is a `hidden beast` number, since 7 + 8 + 9 + 0 + 2 + 2 + 526 + 97 + 6 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 56880406448100 + 22021846249536 = 7541910^2 + 4692744^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 8474085421 + ... + 8474094731.

Almost surely, 2^{78902252697636} is an apocalyptic number.

78902252697636 is the 8882694-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78902252697636

78902252697636 is an abundant number, since it is smaller than the sum of its proper divisors (131351645870077).

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

78902252697636 is an frugal number, since it uses more digits than its factorization.

78902252697636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18744 (or 9369 counting only the distinct ones).

The product of its (nonzero) digits is 823011840, while the sum is 72.

The spelling of 78902252697636 in words is "seventy-eight trillion, nine hundred two billion, two hundred fifty-two million, six hundred ninety-seven thousand, six hundred thirty-six".