55856665377 has 12 divisors (see below), whose sum is σ = 80707081104. Its totient is φ = 37226131800.

The previous prime is 55856665373. The next prime is 55856665399. The reversal of 55856665377 is 77356665855.

It is a happy number.

It is not a de Polignac number, because 55856665377 - 2² = 55856665373 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55856665373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 939999 + ... + 997652.

It is an arithmetic number, because the mean of its divisors is an integer number (6725590092).

Almost surely, 2^55856665377 is an apocalyptic number.

It is an amenable number.

55856665377 is a deficient number, since it is larger than the sum of its proper divisors (24850415727).

55856665377 is a wasteful number, since it uses less digits than its factorization.

55856665377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940860 (or 1940857 counting only the distinct ones).

The product of its digits is 158760000, while the sum is 63.

The spelling of 55856665377 in words is "fifty-five billion, eight hundred fifty-six million, six hundred sixty-five thousand, three hundred seventy-seven".