12621511053 has 24 divisors (see below), whose sum is σ = 18682634880. Its totient is φ = 8206079040.

The previous prime is 12621511033. The next prime is 12621511069. The reversal of 12621511053 is 35011512621.

12621511053 is a `hidden beast` number, since 126 + 21 + 511 + 0 + 5 + 3 = 666.

It is not a de Polignac number, because 12621511053 - 2¹⁸ = 12621248909 is a prime.

It is a super-2 number, since 2×12621511053² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621511033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1443228 + ... + 1451946.

It is an arithmetic number, because the mean of its divisors is an integer number (778443120).

Almost surely, 2^12621511053 is an apocalyptic number.

It is an amenable number.

12621511053 is a deficient number, since it is larger than the sum of its proper divisors (6061123827).

12621511053 is a wasteful number, since it uses less digits than its factorization.

12621511053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12689 (or 12686 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 12621511053 in words is "twelve billion, six hundred twenty-one million, five hundred eleven thousand, fifty-three".