12654356531 has 4 divisors (see below), whose sum is σ = 12843227592. Its totient is φ = 12465485472.

The previous prime is 12654356527. The next prime is 12654356549. The reversal of 12654356531 is 13565345621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13565345621 = 19 ⋅713965559.

It is a cyclic number.

It is not a de Polignac number, because 12654356531 - 2² = 12654356527 is a prime.

It is a super-2 number, since 2×12654356531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12654356501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94435430 + ... + 94435563.

It is an arithmetic number, because the mean of its divisors is an integer number (3210806898).

Almost surely, 2^12654356531 is an apocalyptic number.

12654356531 is a deficient number, since it is larger than the sum of its proper divisors (188871061).

12654356531 is an equidigital number, since it uses as much as digits as its factorization.

12654356531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188871060.

The product of its digits is 324000, while the sum is 41.

The spelling of 12654356531 in words is "twelve billion, six hundred fifty-four million, three hundred fifty-six thousand, five hundred thirty-one".