55401510777 has 4 divisors (see below), whose sum is σ = 73868681040. Its totient is φ = 36934340516.

The previous prime is 55401510743. The next prime is 55401510809. The reversal of 55401510777 is 77701510455.

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 55401510777 - 2¹⁵ = 55401478009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55401510077) 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, 9233585127 + ... + 9233585132.

It is an arithmetic number, because the mean of its divisors is an integer number (18467170260).

Almost surely, 2^55401510777 is an apocalyptic number.

It is an amenable number.

55401510777 is a deficient number, since it is larger than the sum of its proper divisors (18467170263).

55401510777 is a wasteful number, since it uses less digits than its factorization.

55401510777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18467170262.

The product of its (nonzero) digits is 171500, while the sum is 42.

The spelling of 55401510777 in words is "fifty-five billion, four hundred one million, five hundred ten thousand, seven hundred seventy-seven".