55579731251699 has 4 divisors (see below), whose sum is σ = 55579796791464. Its totient is φ = 55579665711936.

The previous prime is 55579731251689. The next prime is 55579731251719. The reversal of 55579731251699 is 99615213797555.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55579731251699 is a prime.

It is a super-2 number, since 2×55579731251699² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55579731251689) 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, 31480937 + ... + 33199530.

It is an arithmetic number, because the mean of its divisors is an integer number (13894949197866).

Almost surely, 2^{55579731251699} is an apocalyptic number.

55579731251699 is a deficient number, since it is larger than the sum of its proper divisors (65539765).

55579731251699 is an equidigital number, since it uses as much as digits as its factorization.

55579731251699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65539764.

The product of its digits is 803722500, while the sum is 74.

The spelling of 55579731251699 in words is "fifty-five trillion, five hundred seventy-nine billion, seven hundred thirty-one million, two hundred fifty-one thousand, six hundred ninety-nine".