185456864478 has 32 divisors (see below), whose sum is σ = 381537126432. Its totient is φ = 60060902400.

The previous prime is 185456864473. The next prime is 185456864503. The reversal of 185456864478 is 874468654581.

185456864478 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×185456864478² (a number of 23 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 1504801 + ... + 1623372.

It is an arithmetic number, because the mean of its divisors is an integer number (11923035201).

Almost surely, 2^185456864478 is an apocalyptic number.

185456864478 is an abundant number, since it is smaller than the sum of its proper divisors (196080261954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

185456864478 is a wasteful number, since it uses less digits than its factorization.

185456864478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128460.

The product of its digits is 206438400, while the sum is 66.

The spelling of 185456864478 in words is "one hundred eighty-five billion, four hundred fifty-six million, eight hundred sixty-four thousand, four hundred seventy-eight".