55725395577 has 4 divisors (see below), whose sum is σ = 74300527440. Its totient is φ = 37150263716.

The previous prime is 55725395573. The next prime is 55725395623. The reversal of 55725395577 is 77559352755.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55725395577 - 2² = 55725395573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55725395577.

It is not an unprimeable number, because it can be changed into a prime (55725395573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9287565927 + ... + 9287565932.

It is an arithmetic number, because the mean of its divisors is an integer number (18575131860).

Almost surely, 2^55725395577 is an apocalyptic number.

It is an amenable number.

55725395577 is a deficient number, since it is larger than the sum of its proper divisors (18575131863).

55725395577 is a wasteful number, since it uses less digits than its factorization.

55725395577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18575131862.

The product of its digits is 57881250, while the sum is 60.

The spelling of 55725395577 in words is "fifty-five billion, seven hundred twenty-five million, three hundred ninety-five thousand, five hundred seventy-seven".