12155554052 has 12 divisors (see below), whose sum is σ = 21275437260. Its totient is φ = 6076857696.

The previous prime is 12155554049. The next prime is 12155554069. The reversal of 12155554052 is 25045555121.

It can be written as a sum of positive squares in 2 ways, for example, as 5604917956 + 6550636096 = 74866^2 + 80936^2 .

It is a super-2 number, since 2×12155554052² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199643 + ... + 253314.

It is an arithmetic number, because the mean of its divisors is an integer number (1772953105).

Almost surely, 2^12155554052 is an apocalyptic number.

It is an amenable number.

12155554052 is a deficient number, since it is larger than the sum of its proper divisors (9119883208).

12155554052 is a wasteful number, since it uses less digits than its factorization.

12155554052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459670 (or 459668 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 35.

The spelling of 12155554052 in words is "twelve billion, one hundred fifty-five million, five hundred fifty-four thousand, fifty-two".