81408002132 has 48 divisors (see below), whose sum is σ = 145875038400. Its totient is φ = 39740194560.

The previous prime is 81408002131. The next prime is 81408002141. The reversal of 81408002132 is 23120080418.

It is a super-2 number, since 2×81408002132² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81408002095 and 81408002104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81408002131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29829344 + ... + 29832072.

It is an arithmetic number, because the mean of its divisors is an integer number (3039063300).

Almost surely, 2^81408002132 is an apocalyptic number.

It is an amenable number.

81408002132 is a deficient number, since it is larger than the sum of its proper divisors (64467036268).

81408002132 is a wasteful number, since it uses less digits than its factorization.

81408002132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3656 (or 3654 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The spelling of 81408002132 in words is "eighty-one billion, four hundred eight million, two thousand, one hundred thirty-two".