70646513728 has 56 divisors (see below), whose sum is σ = 162146601792. Its totient is φ = 29912277504.

The previous prime is 70646513699. The next prime is 70646513747. The reversal of 70646513728 is 82731564607.

It is a tau number, because it is divible by the number of its divisors (56).

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, 912775 + ... + 987142.

It is an arithmetic number, because the mean of its divisors is an integer number (2895475032).

Almost surely, 2^70646513728 is an apocalyptic number.

It is an amenable number.

70646513728 is an abundant number, since it is smaller than the sum of its proper divisors (91500088064).

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

70646513728 is a wasteful number, since it uses less digits than its factorization.

70646513728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900019 (or 1900009 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 70646513728 in words is "seventy billion, six hundred forty-six million, five hundred thirteen thousand, seven hundred twenty-eight".