81095424425 has 12 divisors (see below), whose sum is σ = 101935839900. Its totient is φ = 63987621120.

The previous prime is 81095424413. The next prime is 81095424457. The reversal of 81095424425 is 52442459018.

It can be written as a sum of positive squares in 6 ways, for example, as 10437278569 + 70658145856 = 102163^2 + 265816^2 .

It is not a de Polignac number, because 81095424425 - 2⁴ = 81095424409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22216100 + ... + 22219749.

It is an arithmetic number, because the mean of its divisors is an integer number (8494653325).

Almost surely, 2^81095424425 is an apocalyptic number.

It is an amenable number.

81095424425 is a deficient number, since it is larger than the sum of its proper divisors (20840415475).

81095424425 is a wasteful number, since it uses less digits than its factorization.

81095424425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44435932 (or 44435927 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 44.

The spelling of 81095424425 in words is "eighty-one billion, ninety-five million, four hundred twenty-four thousand, four hundred twenty-five".