55610785551 has 4 divisors (see below), whose sum is σ = 74147714072. Its totient is φ = 37073857032.

The previous prime is 55610785513. The next prime is 55610785553. The reversal of 55610785551 is 15558701655.

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

It is not a de Polignac number, because 55610785551 - 2⁷ = 55610785423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55610785551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55610785553) 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, 9268464256 + ... + 9268464261.

It is an arithmetic number, because the mean of its divisors is an integer number (18536928518).

Almost surely, 2^55610785551 is an apocalyptic number.

55610785551 is a deficient number, since it is larger than the sum of its proper divisors (18536928521).

55610785551 is a wasteful number, since it uses less digits than its factorization.

55610785551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18536928520.

The product of its (nonzero) digits is 1050000, while the sum is 48.

The spelling of 55610785551 in words is "fifty-five billion, six hundred ten million, seven hundred eighty-five thousand, five hundred fifty-one".