54400664478 has 16 divisors (see below), whose sum is σ = 112553099280. Its totient is φ = 17508259776.

The previous prime is 54400664467. The next prime is 54400664497. The reversal of 54400664478 is 87446600445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156323575 + ... + 156323922.

It is an arithmetic number, because the mean of its divisors is an integer number (7034568705).

Almost surely, 2^54400664478 is an apocalyptic number.

54400664478 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

54400664478 is an abundant number, since it is smaller than the sum of its proper divisors (58152434802).

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

54400664478 is a wasteful number, since it uses less digits than its factorization.

54400664478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312647531.

The product of its (nonzero) digits is 2580480, while the sum is 48.

The spelling of 54400664478 in words is "fifty-four billion, four hundred million, six hundred sixty-four thousand, four hundred seventy-eight".