12154913745831 has 12 divisors (see below), whose sum is σ = 18123455621440. Its totient is φ = 7841879835840.

The previous prime is 12154913745797. The next prime is 12154913745841. The reversal of 12154913745831 is 13854731945121.

It is a happy number.

12154913745831 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 49 + 13 + 7 + 4 + 583 + 1 = 666.

It is not a de Polignac number, because 12154913745831 - 2¹⁴ = 12154913729447 is a prime.

It is a super-2 number, since 2×12154913745831² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12154913745841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21782999266 + ... + 21782999823.

Almost surely, 2^{12154913745831} is an apocalyptic number.

12154913745831 is a deficient number, since it is larger than the sum of its proper divisors (5968541875609).

12154913745831 is a wasteful number, since it uses less digits than its factorization.

12154913745831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43565999126 (or 43565999123 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The spelling of 12154913745831 in words is "twelve trillion, one hundred fifty-four billion, nine hundred thirteen million, seven hundred forty-five thousand, eight hundred thirty-one".