81292082425 has 24 divisors (see below), whose sum is σ = 102975409152. Its totient is φ = 63632352000.

The previous prime is 81292082401. The next prime is 81292082461. The reversal of 81292082425 is 52428029218.

It is not a de Polignac number, because 81292082425 - 2⁵ = 81292082393 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5669265 + ... + 5683585.

It is an arithmetic number, because the mean of its divisors is an integer number (4290642048).

Almost surely, 2^81292082425 is an apocalyptic number.

It is an amenable number.

81292082425 is a deficient number, since it is larger than the sum of its proper divisors (21683326727).

81292082425 is a wasteful number, since it uses less digits than its factorization.

81292082425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19209 (or 19204 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 81292082425 in words is "eighty-one billion, two hundred ninety-two million, eighty-two thousand, four hundred twenty-five".