55123111525 has 24 divisors (see below), whose sum is σ = 70219058024. Its totient is φ = 42895008000.

The previous prime is 55123111523. The next prime is 55123111531. The reversal of 55123111525 is 52511132155.

It can be written as a sum of positive squares in 12 ways, for example, as 2391796836 + 52731314689 = 48906^2 + 229633^2 .

It is not a de Polignac number, because 55123111525 - 2¹ = 55123111523 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55123111523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5268199 + ... + 5278651.

Almost surely, 2^55123111525 is an apocalyptic number.

It is an amenable number.

55123111525 is a deficient number, since it is larger than the sum of its proper divisors (15095946499).

55123111525 is a wasteful number, since it uses less digits than its factorization.

55123111525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16201 (or 16196 counting only the distinct ones).

The product of its digits is 7500, while the sum is 31.

The spelling of 55123111525 in words is "fifty-five billion, one hundred twenty-three million, one hundred eleven thousand, five hundred twenty-five".