81292425152 has 14 divisors (see below), whose sum is σ = 161314656288. Its totient is φ = 40646212544.

The previous prime is 81292425133. The next prime is 81292425199. The reversal of 81292425152 is 25152429218.

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, 635097008 + ... + 635097135.

Almost surely, 2^81292425152 is an apocalyptic number.

It is an amenable number.

81292425152 is a deficient number, since it is larger than the sum of its proper divisors (80022231136).

81292425152 is a wasteful number, since it uses less digits than its factorization.

81292425152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270194155 (or 1270194145 counting only the distinct ones).

The product of its digits is 115200, while the sum is 41.

The spelling of 81292425152 in words is "eighty-one billion, two hundred ninety-two million, four hundred twenty-five thousand, one hundred fifty-two".