70656691894 has 4 divisors (see below), whose sum is σ = 105985037844. Its totient is φ = 35328345946.

The previous prime is 70656691873. The next prime is 70656691913. The reversal of 70656691894 is 49819665607.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17664172972 + ... + 17664172975.

It is an arithmetic number, because the mean of its divisors is an integer number (26496259461).

Almost surely, 2^70656691894 is an apocalyptic number.

70656691894 is a deficient number, since it is larger than the sum of its proper divisors (35328345950).

70656691894 is a wasteful number, since it uses less digits than its factorization.

70656691894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35328345949.

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 70656691894 in words is "seventy billion, six hundred fifty-six million, six hundred ninety-one thousand, eight hundred ninety-four".