123057056431 has 4 divisors (see below), whose sum is σ = 123744526200. Its totient is φ = 122369586664.

The previous prime is 123057056429. The next prime is 123057056449. The reversal of 123057056431 is 134650750321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123057056431 - 2¹ = 123057056429 is a prime.

It is a super-2 number, since 2×123057056431² (a number of 23 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 (123057056471) 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, 343734616 + ... + 343734973.

It is an arithmetic number, because the mean of its divisors is an integer number (30936131550).

Almost surely, 2^123057056431 is an apocalyptic number.

123057056431 is a deficient number, since it is larger than the sum of its proper divisors (687469769).

123057056431 is an equidigital number, since it uses as much as digits as its factorization.

123057056431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687469768.

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 123057056431 in words is "one hundred twenty-three billion, fifty-seven million, fifty-six thousand, four hundred thirty-one".