81425959596 has 18 divisors (see below), whose sum is σ = 205826731292. Its totient is φ = 27141986520.

The previous prime is 81425959583. The next prime is 81425959609. The reversal of 81425959596 is 69595952418.

81425959596 is a `hidden beast` number, since 8 + 14 + 25 + 9 + 5 + 9 + 596 = 666.

It is an interprime number because it is at equal distance from previous prime (81425959583) and next prime (81425959609).

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×81425959596² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1130916070 + ... + 1130916141.

Almost surely, 2^81425959596 is an apocalyptic number.

It is an amenable number.

81425959596 is an abundant number, since it is smaller than the sum of its proper divisors (124400771696).

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

81425959596 is a wasteful number, since it uses less digits than its factorization.

81425959596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261832221 (or 2261832216 counting only the distinct ones).

The product of its digits is 34992000, while the sum is 63.

The spelling of 81425959596 in words is "eighty-one billion, four hundred twenty-five million, nine hundred fifty-nine thousand, five hundred ninety-six".