12690543555 has 48 divisors (see below), whose sum is σ = 23647403520. Its totient is φ = 6275617344.

The previous prime is 12690543533. The next prime is 12690543559. The reversal of 12690543555 is 55534509621.

12690543555 is a `hidden beast` number, since 1 + 2 + 6 + 90 + 5 + 4 + 3 + 555 = 666.

It is not a de Polignac number, because 12690543555 - 2⁷ = 12690543427 is a prime.

It is a super-2 number, since 2×12690543555² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12690543555.

It is not an unprimeable number, because it can be changed into a prime (12690543559) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 117717 + ... + 198086.

It is an arithmetic number, because the mean of its divisors is an integer number (492654240).

Almost surely, 2^12690543555 is an apocalyptic number.

12690543555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12690543555 is a deficient number, since it is larger than the sum of its proper divisors (10956859965).

12690543555 is a wasteful number, since it uses less digits than its factorization.

12690543555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315880 (or 315877 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 12690543555 in words is "twelve billion, six hundred ninety million, five hundred forty-three thousand, five hundred fifty-five".