80942813956 has 12 divisors (see below), whose sum is σ = 142731222480. Its totient is φ = 40162464680.

The previous prime is 80942813953. The next prime is 80942813969. The reversal of 80942813956 is 65931824908.

It is a super-2 number, since 2×80942813956² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80942813897 and 80942813906.

It is not an unprimeable number, because it can be changed into a prime (80942813951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77234986 + ... + 77236033.

It is an arithmetic number, because the mean of its divisors is an integer number (11894268540).

Almost surely, 2^80942813956 is an apocalyptic number.

It is an amenable number.

80942813956 is a deficient number, since it is larger than the sum of its proper divisors (61788408524).

80942813956 is a wasteful number, since it uses less digits than its factorization.

80942813956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154471154 (or 154471152 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 80942813956 in words is "eighty billion, nine hundred forty-two million, eight hundred thirteen thousand, nine hundred fifty-six".