12621578153743 has 16 divisors (see below), whose sum is σ = 13599513446400. Its totient is φ = 11644650284256.

The previous prime is 12621578153713. The next prime is 12621578153777. The reversal of 12621578153743 is 34735187512621.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12621578153743 - 2²¹ = 12621576056591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621578153713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514167796 + ... + 514192342.

It is an arithmetic number, because the mean of its divisors is an integer number (849969590400).

Almost surely, 2^{12621578153743} is an apocalyptic number.

12621578153743 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12621578153743 is a deficient number, since it is larger than the sum of its proper divisors (977935292657).

12621578153743 is a wasteful number, since it uses less digits than its factorization.

12621578153743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43446.

The product of its digits is 8467200, while the sum is 55.

The spelling of 12621578153743 in words is "twelve trillion, six hundred twenty-one billion, five hundred seventy-eight million, one hundred fifty-three thousand, seven hundred forty-three".