81037432423584 has 144 divisors (see below), whose sum is σ = 283631013574272. Its totient is φ = 21372509643264.

The previous prime is 81037432423559. The next prime is 81037432423627. The reversal of 81037432423584 is 48532423473018.

81037432423584 is a `hidden beast` number, since 8 + 1 + 0 + 3 + 7 + 4 + 32 + 4 + 23 + 584 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 81037432423584.

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, 1546017604 + ... + 1546070019.

It is an arithmetic number, because the mean of its divisors is an integer number (1969659816488).

Almost surely, 2^{81037432423584} is an apocalyptic number.

81037432423584 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

81037432423584 is an abundant number, since it is smaller than the sum of its proper divisors (202593581150688).

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

81037432423584 is a wasteful number, since it uses less digits than its factorization.

81037432423584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3092087659 (or 3092087648 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 54.

The spelling of 81037432423584 in words is "eighty-one trillion, thirty-seven billion, four hundred thirty-two million, four hundred twenty-three thousand, five hundred eighty-four".