56555665172255 has 4 divisors (see below), whose sum is σ = 67866798206712. Its totient is φ = 45244532137800.

The previous prime is 56555665172231. The next prime is 56555665172257. The reversal of 56555665172255 is 55227156655565.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 56555665172255 - 2⁴² = 52157618661151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56555665172191 and 56555665172200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56555665172257) 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, 5655566517221 + ... + 5655566517230.

It is an arithmetic number, because the mean of its divisors is an integer number (16966699551678).

Almost surely, 2^{56555665172255} is an apocalyptic number.

56555665172255 is a deficient number, since it is larger than the sum of its proper divisors (11311133034457).

56555665172255 is a wasteful number, since it uses less digits than its factorization.

56555665172255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11311133034456.

The product of its digits is 472500000, while the sum is 65.

The spelling of 56555665172255 in words is "fifty-six trillion, five hundred fifty-five billion, six hundred sixty-five million, one hundred seventy-two thousand, two hundred fifty-five".