80649442512 has 30 divisors (see below), whose sum is σ = 225706426322. Its totient is φ = 26883147456.

The previous prime is 80649442499. The next prime is 80649442513. The reversal of 80649442512 is 21524494608.

It is a happy number.

80649442512 is a `hidden beast` number, since 8 + 0 + 6 + 4 + 94 + 42 + 512 = 666.

It can be written as a sum of positive squares in only one way, i.e., 79402222656 + 1247219856 = 281784^2 + 35316^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80649442513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 280032643 + ... + 280032930.

Almost surely, 2^80649442512 is an apocalyptic number.

It is an amenable number.

80649442512 is an abundant number, since it is smaller than the sum of its proper divisors (145056983810).

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

80649442512 is a wasteful number, since it uses less digits than its factorization.

80649442512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560065587 (or 560065578 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 80649442512 in words is "eighty billion, six hundred forty-nine million, four hundred forty-two thousand, five hundred twelve".