80121244856 has 32 divisors (see below), whose sum is σ = 158188472400. Its totient is φ = 37939104000.

The previous prime is 80121244843. The next prime is 80121244991. The reversal of 80121244856 is 65844212108.

It is a congruent number.

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, 359606 + ... + 538106.

Almost surely, 2^80121244856 is an apocalyptic number.

It is an amenable number.

80121244856 is a deficient number, since it is larger than the sum of its proper divisors (78067227544).

80121244856 is a wasteful number, since it uses less digits than its factorization.

80121244856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181479 (or 181475 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The spelling of 80121244856 in words is "eighty billion, one hundred twenty-one million, two hundred forty-four thousand, eight hundred fifty-six".