55571557625 has 16 divisors (see below), whose sum is σ = 69705382032. Its totient is φ = 44231555200.

The previous prime is 55571557609. The next prime is 55571557627. The reversal of 55571557625 is 52675517555.

It can be written as a sum of positive squares in 8 ways, for example, as 14106787984 + 41464769641 = 118772^2 + 203629^2 .

It is not a de Polignac number, because 55571557625 - 2⁴ = 55571557609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55571557627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1103732 + ... + 1152981.

It is an arithmetic number, because the mean of its divisors is an integer number (4356586377).

Almost surely, 2^55571557625 is an apocalyptic number.

It is an amenable number.

55571557625 is a deficient number, since it is larger than the sum of its proper divisors (14133824407).

55571557625 is a wasteful number, since it uses less digits than its factorization.

55571557625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256925 (or 2256915 counting only the distinct ones).

The product of its digits is 9187500, while the sum is 53.

The spelling of 55571557625 in words is "fifty-five billion, five hundred seventy-one million, five hundred fifty-seven thousand, six hundred twenty-five".