70307657856 has 160 divisors (see below), whose sum is σ = 211157426700. Its totient is φ = 23220504576.

The previous prime is 70307657837. The next prime is 70307657857. The reversal of 70307657856 is 65875670307.

It can be written as a sum of positive squares in 2 ways, for example, as 67745678400 + 2561979456 = 260280^2 + 50616^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (70307657857) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1099006 + ... + 1161218.

Almost surely, 2^70307657856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70307657856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105578713350).

70307657856 is an abundant number, since it is smaller than the sum of its proper divisors (140849768844).

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

70307657856 is a wasteful number, since it uses less digits than its factorization.

70307657856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62348 (or 62327 counting only the distinct ones).

The product of its (nonzero) digits is 7408800, while the sum is 54.

The spelling of 70307657856 in words is "seventy billion, three hundred seven million, six hundred fifty-seven thousand, eight hundred fifty-six".