54771951920 has 80 divisors (see below), whose sum is σ = 146408629248. Its totient is φ = 18666474240.

The previous prime is 54771951919. The next prime is 54771951943. The reversal of 54771951920 is 2915917745.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199316 + ... + 386355.

Almost surely, 2^54771951920 is an apocalyptic number.

It is an amenable number.

54771951920 is an abundant number, since it is smaller than the sum of its proper divisors (91636677328).

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

54771951920 is a wasteful number, since it uses less digits than its factorization.

54771951920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585858 (or 585852 counting only the distinct ones).

The product of its (nonzero) digits is 793800, while the sum is 50.

The spelling of 54771951920 in words is "fifty-four billion, seven hundred seventy-one million, nine hundred fifty-one thousand, nine hundred twenty".