81410229925 has 12 divisors (see below), whose sum is σ = 100959187876. Its totient is φ = 65121408000.

The previous prime is 81410229847. The next prime is 81410229941. The reversal of 81410229925 is 52992201418.

It can be written as a sum of positive squares in 6 ways, for example, as 866654721 + 80543575204 = 29439^2 + 283802^2 .

It is not a de Polignac number, because 81410229925 - 2³⁵ = 47050491557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83077 + ... + 411973.

Almost surely, 2^81410229925 is an apocalyptic number.

It is an amenable number.

81410229925 is a deficient number, since it is larger than the sum of its proper divisors (19548957951).

81410229925 is a wasteful number, since it uses less digits than its factorization.

81410229925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338808 (or 338803 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 81410229925 in words is "eighty-one billion, four hundred ten million, two hundred twenty-nine thousand, nine hundred twenty-five".