54405521525 has 24 divisors (see below), whose sum is σ = 68328502440. Its totient is φ = 42968828160.

The previous prime is 54405521483. The next prime is 54405521539. The reversal of 54405521525 is 52512550445.

It can be written as a sum of positive squares in 12 ways, for example, as 32633338609 + 21772182916 = 180647^2 + 147554^2 .

It is not a de Polignac number, because 54405521525 - 2²⁴ = 54388744309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 718787 + ... + 790863.

It is an arithmetic number, because the mean of its divisors is an integer number (2847020935).

Almost surely, 2^54405521525 is an apocalyptic number.

It is an amenable number.

54405521525 is a deficient number, since it is larger than the sum of its proper divisors (13922980915).

54405521525 is a wasteful number, since it uses less digits than its factorization.

54405521525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72473 (or 72468 counting only the distinct ones).

The product of its (nonzero) digits is 200000, while the sum is 38.

The spelling of 54405521525 in words is "fifty-four billion, four hundred five million, five hundred twenty-one thousand, five hundred twenty-five".