54978145520 has 40 divisors (see below), whose sum is σ = 135343261584. Its totient is φ = 20697654272.

The previous prime is 54978145517. The next prime is 54978145543. The reversal of 54978145520 is 2554187945.

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

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, 20211194 + ... + 20213913.

Almost surely, 2^54978145520 is an apocalyptic number.

It is an amenable number.

54978145520 is an abundant number, since it is smaller than the sum of its proper divisors (80365116064).

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

54978145520 is a wasteful number, since it uses less digits than its factorization.

54978145520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40425137 (or 40425131 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 50.

The spelling of 54978145520 in words is "fifty-four billion, nine hundred seventy-eight million, one hundred forty-five thousand, five hundred twenty".