70881991356 has 96 divisors (see below), whose sum is σ = 193142476800. Its totient is φ = 20003958720.

The previous prime is 70881991343. The next prime is 70881991361. The reversal of 70881991356 is 65319918807.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 70881991296 and 70881991305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91540 + ... + 387483.

It is an arithmetic number, because the mean of its divisors is an integer number (2011900800).

Almost surely, 2^70881991356 is an apocalyptic number.

70881991356 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

70881991356 is an abundant number, since it is smaller than the sum of its proper divisors (122260485444).

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

70881991356 is a wasteful number, since it uses less digits than its factorization.

70881991356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479119 (or 479117 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 57.

The spelling of 70881991356 in words is "seventy billion, eight hundred eighty-one million, nine hundred ninety-one thousand, three hundred fifty-six".