55705257507 has 4 divisors (see below), whose sum is σ = 74273676680. Its totient is φ = 37136838336.

The previous prime is 55705257493. The next prime is 55705257511. The reversal of 55705257507 is 70575250755.

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

It is not a de Polignac number, because 55705257507 - 2¹⁹ = 55704733219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55705257007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9284209582 + ... + 9284209587.

It is an arithmetic number, because the mean of its divisors is an integer number (18568419170).

Almost surely, 2^55705257507 is an apocalyptic number.

55705257507 is a deficient number, since it is larger than the sum of its proper divisors (18568419173).

55705257507 is a wasteful number, since it uses less digits than its factorization.

55705257507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18568419172.

The product of its (nonzero) digits is 2143750, while the sum is 48.

The spelling of 55705257507 in words is "fifty-five billion, seven hundred five million, two hundred fifty-seven thousand, five hundred seven".