55751887857 has 4 divisors (see below), whose sum is σ = 74335850480. Its totient is φ = 37167925236.

The previous prime is 55751887831. The next prime is 55751887901. The reversal of 55751887857 is 75878815755.

It is a happy number.

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 not a de Polignac number, because 55751887857 - 2¹⁰ = 55751886833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55751887057) 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, 9291981307 + ... + 9291981312.

It is an arithmetic number, because the mean of its divisors is an integer number (18583962620).

Almost surely, 2^55751887857 is an apocalyptic number.

It is an amenable number.

55751887857 is a deficient number, since it is larger than the sum of its proper divisors (18583962623).

55751887857 is a wasteful number, since it uses less digits than its factorization.

55751887857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18583962622.

The product of its digits is 109760000, while the sum is 66.

The spelling of 55751887857 in words is "fifty-five billion, seven hundred fifty-one million, eight hundred eighty-seven thousand, eight hundred fifty-seven".