12440436552 has 24 divisors (see below), whose sum is σ = 33692849190. Its totient is φ = 4146812160.

The previous prime is 12440436529. The next prime is 12440436557. The reversal of 12440436552 is 25563404421.

12440436552 is a `hidden beast` number, since 1 + 24 + 40 + 43 + 6 + 552 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8583281316 + 3857155236 = 92646^2 + 62106^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is not an unprimeable number, because it can be changed into a prime (12440436557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86391849 + ... + 86391992.

Almost surely, 2^12440436552 is an apocalyptic number.

12440436552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12440436552 is an abundant number, since it is smaller than the sum of its proper divisors (21252412638).

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

12440436552 is a wasteful number, since it uses less digits than its factorization.

12440436552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172783853 (or 172783846 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 12440436552 in words is "twelve billion, four hundred forty million, four hundred thirty-six thousand, five hundred fifty-two".