13121611553634 has 32 divisors (see below), whose sum is σ = 27391954222080. Its totient is φ = 4182522574032.

The previous prime is 13121611553627. The next prime is 13121611553641. The reversal of 13121611553634 is 43635511612131.

It is an interprime number because it is at equal distance from previous prime (13121611553627) and next prime (13121611553641).

It is a super-2 number, since 2×13121611553634² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12913974 + ... + 13892945.

It is an arithmetic number, because the mean of its divisors is an integer number (855998569440).

Almost surely, 2^{13121611553634} is an apocalyptic number.

13121611553634 is an abundant number, since it is smaller than the sum of its proper divisors (14270342668446).

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

13121611553634 is a wasteful number, since it uses less digits than its factorization.

13121611553634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26810494.

The product of its digits is 194400, while the sum is 42.

The spelling of 13121611553634 in words is "thirteen trillion, one hundred twenty-one billion, six hundred eleven million, five hundred fifty-three thousand, six hundred thirty-four".