55777077755 has 32 divisors (see below), whose sum is σ = 77495007744. Its totient is φ = 37747719936.

The previous prime is 55777077737. The next prime is 55777077791.

55777077755 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 55777077755 - 2⁶ = 55777077691 is a prime.

It is a super-2 number, since 2×55777077755² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2991572 + ... + 3010158.

It is an arithmetic number, because the mean of its divisors is an integer number (2421718992).

Almost surely, 2^55777077755 is an apocalyptic number.

55777077755 is a deficient number, since it is larger than the sum of its proper divisors (21717929989).

55777077755 is a wasteful number, since it uses less digits than its factorization.

55777077755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19715.

The product of its (nonzero) digits is 73530625, while the sum is 62.

The spelling of 55777077755 in words is "fifty-five billion, seven hundred seventy-seven million, seventy-seven thousand, seven hundred fifty-five".