123254279874658 has 4 divisors (see below), whose sum is σ = 184881419811990. Its totient is φ = 61627139937328.

The previous prime is 123254279874613. The next prime is 123254279874659. The reversal of 123254279874658 is 856478972452321.

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

It can be written as a sum of positive squares in only one way, i.e., 64733722958529 + 58520556916129 = 8045727^2 + 7649873^2 .

It is not an unprimeable number, because it can be changed into a prime (123254279874659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30813569968663 + ... + 30813569968666.

Almost surely, 2^{123254279874658} is an apocalyptic number.

123254279874658 is a deficient number, since it is larger than the sum of its proper divisors (61627139937332).

123254279874658 is an equidigital number, since it uses as much as digits as its factorization.

123254279874658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61627139937331.

The product of its digits is 1625702400, while the sum is 73.

The spelling of 123254279874658 in words is "one hundred twenty-three trillion, two hundred fifty-four billion, two hundred seventy-nine million, eight hundred seventy-four thousand, six hundred fifty-eight".