71852031540 has 72 divisors (see below), whose sum is σ = 225466736040. Its totient is φ = 18499832064.

The previous prime is 71852031523. The next prime is 71852031551. The reversal of 71852031540 is 4513025817.

71852031540 is a `hidden beast` number, since 7 + 1 + 85 + 2 + 0 + 31 + 540 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4912888464 + 66939143076 = 70092^2 + 258726^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 71852031495 and 71852031504.

It is a congruent number.

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, 6877159 + ... + 6887598.

It is an arithmetic number, because the mean of its divisors is an integer number (3131482445).

Almost surely, 2^71852031540 is an apocalyptic number.

It is an amenable number.

71852031540 is an abundant number, since it is smaller than the sum of its proper divisors (153614704500).

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

71852031540 is a wasteful number, since it uses less digits than its factorization.

71852031540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13764801 (or 13764796 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 71852031540 in words is "seventy-one billion, eight hundred fifty-two million, thirty-one thousand, five hundred forty".