70999706640 has 80 divisors (see below), whose sum is σ = 220192174656. Its totient is φ = 18925248000.

The previous prime is 70999706639. The next prime is 70999706669. The reversal of 70999706640 is 4660799907.

It is a tau number, because it is divible by the number of its divisors (80).

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, 517290 + ... + 639990.

Almost surely, 2^70999706640 is an apocalyptic number.

It is an amenable number.

70999706640 is an abundant number, since it is smaller than the sum of its proper divisors (149192468016).

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

70999706640 is a wasteful number, since it uses less digits than its factorization.

70999706640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125128 (or 125122 counting only the distinct ones).

The product of its (nonzero) digits is 5143824, while the sum is 57.

The spelling of 70999706640 in words is "seventy billion, nine hundred ninety-nine million, seven hundred six thousand, six hundred forty".