12840052532 has 6 divisors (see below), whose sum is σ = 22470091938. Its totient is φ = 6420026264.

The previous prime is 12840052487. The next prime is 12840052549. The reversal of 12840052532 is 23525004821.

It can be written as a sum of positive squares in only one way, i.e., 12300140836 + 539911696 = 110906^2 + 23236^2 .

It is a super-2 number, since 2×12840052532² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1605006563 + ... + 1605006570.

It is an arithmetic number, because the mean of its divisors is an integer number (3745015323).

Almost surely, 2^12840052532 is an apocalyptic number.

It is an amenable number.

12840052532 is a deficient number, since it is larger than the sum of its proper divisors (9630039406).

12840052532 is a wasteful number, since it uses less digits than its factorization.

12840052532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210013137 (or 3210013135 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 12840052532 in words is "twelve billion, eight hundred forty million, fifty-two thousand, five hundred thirty-two".