185456864479 has 4 divisors (see below), whose sum is σ = 187293071160. Its totient is φ = 183620657800.

The previous prime is 185456864473. The next prime is 185456864503. The reversal of 185456864479 is 974468654581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974468654581 = 190403 ⋅5117927.

It is a cyclic number.

It is not a de Polignac number, because 185456864479 - 2¹¹ = 185456862431 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 (185456864473) 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, 918103189 + ... + 918103390.

It is an arithmetic number, because the mean of its divisors is an integer number (46823267790).

Almost surely, 2^185456864479 is an apocalyptic number.

185456864479 is a deficient number, since it is larger than the sum of its proper divisors (1836206681).

185456864479 is a wasteful number, since it uses less digits than its factorization.

185456864479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836206680.

The product of its digits is 232243200, while the sum is 67.

The spelling of 185456864479 in words is "one hundred eighty-five billion, four hundred fifty-six million, eight hundred sixty-four thousand, four hundred seventy-nine".