70191621265936 has 45 divisors (see below), whose sum is σ = 136798214851501. Its totient is φ = 34890062628416.

The previous prime is 70191621265921. The next prime is 70191621265937. The reversal of 70191621265936 is 63956212619107.

The square root of 70191621265936 is 8378044.

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

It can be written as a sum of positive squares in only one way, i.e., 63850007984400 + 6341613281536 = 7990620^2 + 2518256^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70191621265937) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5797600395 + ... + 5797612501.

Almost surely, 2^{70191621265936} is an apocalyptic number.

70191621265936 is the 8378044-th square number.

It is an amenable number.

70191621265936 is a deficient number, since it is larger than the sum of its proper divisors (66606593585565).

70191621265936 is an frugal number, since it uses more digits than its factorization.

70191621265936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24568 (or 12282 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 58.

The spelling of 70191621265936 in words is "seventy trillion, one hundred ninety-one billion, six hundred twenty-one million, two hundred sixty-five thousand, nine hundred thirty-six".