55404640455 has 16 divisors (see below), whose sum is σ = 91043301984. Its totient is φ = 28750515840.

The previous prime is 55404640451. The next prime is 55404640457.

55404640455 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55404640455 - 2² = 55404640451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55404640451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49913536 + ... + 49914645.

It is an arithmetic number, because the mean of its divisors is an integer number (5690206374).

Almost surely, 2^55404640455 is an apocalyptic number.

55404640455 is a deficient number, since it is larger than the sum of its proper divisors (35638661529).

55404640455 is a wasteful number, since it uses less digits than its factorization.

55404640455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99828226.

The product of its (nonzero) digits is 960000, while the sum is 42.

The spelling of 55404640455 in words is "fifty-five billion, four hundred four million, six hundred forty thousand, four hundred fifty-five".