81262266924 has 12 divisors (see below), whose sum is σ = 189611956184. Its totient is φ = 27087422304.

The previous prime is 81262266893. The next prime is 81262266959. The reversal of 81262266924 is 42966226218.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3385927777 + ... + 3385927800.

Almost surely, 2^81262266924 is an apocalyptic number.

It is an amenable number.

81262266924 is an abundant number, since it is smaller than the sum of its proper divisors (108349689260).

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

81262266924 is a wasteful number, since it uses less digits than its factorization.

81262266924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6771855584 (or 6771855582 counting only the distinct ones).

The product of its digits is 995328, while the sum is 48.

The spelling of 81262266924 in words is "eighty-one billion, two hundred sixty-two million, two hundred sixty-six thousand, nine hundred twenty-four".