54961131920 has 40 divisors (see below), whose sum is σ = 135301378104. Its totient is φ = 20691249152.

The previous prime is 54961131899. The next prime is 54961131991. The reversal of 54961131920 is 2913116945.

It can be written as a sum of positive squares in 4 ways, for example, as 16515334144 + 38445797776 = 128512^2 + 196076^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 20204939 + ... + 20207658.

Almost surely, 2^54961131920 is an apocalyptic number.

It is an amenable number.

54961131920 is an abundant number, since it is smaller than the sum of its proper divisors (80340246184).

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

54961131920 is a wasteful number, since it uses less digits than its factorization.

54961131920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40412627 (or 40412621 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The spelling of 54961131920 in words is "fifty-four billion, nine hundred sixty-one million, one hundred thirty-one thousand, nine hundred twenty".