123185361477 has 4 divisors (see below), whose sum is σ = 164247148640. Its totient is φ = 82123574316.

The previous prime is 123185361473. The next prime is 123185361487. The reversal of 123185361477 is 774163581321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 123185361477 - 2² = 123185361473 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 (123185361473) 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, 20530893577 + ... + 20530893582.

It is an arithmetic number, because the mean of its divisors is an integer number (41061787160).

Almost surely, 2^123185361477 is an apocalyptic number.

It is an amenable number.

123185361477 is a deficient number, since it is larger than the sum of its proper divisors (41061787163).

123185361477 is an equidigital number, since it uses as much as digits as its factorization.

123185361477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41061787162.

The product of its digits is 846720, while the sum is 48.

The spelling of 123185361477 in words is "one hundred twenty-three billion, one hundred eighty-five million, three hundred sixty-one thousand, four hundred seventy-seven".