55540637405 has 16 divisors (see below), whose sum is σ = 72723711168. Its totient is φ = 40384320000.

The previous prime is 55540637393. The next prime is 55540637419. The reversal of 55540637405 is 50473604555.

It is a happy number.

It is not a de Polignac number, because 55540637405 - 2³⁴ = 38360768221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147245 + ... + 364365.

It is an arithmetic number, because the mean of its divisors is an integer number (4545231948).

Almost surely, 2^55540637405 is an apocalyptic number.

55540637405 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55540637405 is a deficient number, since it is larger than the sum of its proper divisors (17183073763).

55540637405 is a wasteful number, since it uses less digits than its factorization.

55540637405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221788.

The product of its (nonzero) digits is 1260000, while the sum is 44.

The spelling of 55540637405 in words is "fifty-five billion, five hundred forty million, six hundred thirty-seven thousand, four hundred five".