70638281772 has 24 divisors (see below), whose sum is σ = 165928854000. Its totient is φ = 23388065856.

The previous prime is 70638281729. The next prime is 70638281803. The reversal of 70638281772 is 27718283607.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19751647 + ... + 19755222.

It is an arithmetic number, because the mean of its divisors is an integer number (6913702250).

Almost surely, 2^70638281772 is an apocalyptic number.

It is an amenable number.

70638281772 is an abundant number, since it is smaller than the sum of its proper divisors (95290572228).

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

70638281772 is a wasteful number, since it uses less digits than its factorization.

70638281772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39507025 (or 39507023 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 51.

The spelling of 70638281772 in words is "seventy billion, six hundred thirty-eight million, two hundred eighty-one thousand, seven hundred seventy-two".