12351993553251 has 40 divisors (see below), whose sum is σ = 20249708903424. Its totient is φ = 7441229922480.

The previous prime is 12351993553223. The next prime is 12351993553253. The reversal of 12351993553251 is 15235539915321.

12351993553251 is a `hidden beast` number, since 1 + 2 + 3 + 5 + 19 + 93 + 5 + 532 + 5 + 1 = 666.

It is not a de Polignac number, because 12351993553251 - 2⁵ = 12351993553219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12351993553253) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 41357395 + ... + 41654988.

Almost surely, 2^{12351993553251} is an apocalyptic number.

12351993553251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12351993553251 is a deficient number, since it is larger than the sum of its proper divisors (7897715350173).

12351993553251 is a wasteful number, since it uses less digits than its factorization.

12351993553251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83012573 (or 83012564 counting only the distinct ones).

The product of its digits is 5467500, while the sum is 54.

The spelling of 12351993553251 in words is "twelve trillion, three hundred fifty-one billion, nine hundred ninety-three million, five hundred fifty-three thousand, two hundred fifty-one".