5551917685 has 4 divisors (see below), whose sum is σ = 6662301228. Its totient is φ = 4441534144.

The previous prime is 5551917677. The next prime is 5551917703. The reversal of 5551917685 is 5867191555.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3920888689 + 1631028996 = 62617^2 + 40386^2 .

It is a cyclic number.

It is not a de Polignac number, because 5551917685 - 2³ = 5551917677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555191764 + ... + 555191773.

It is an arithmetic number, because the mean of its divisors is an integer number (1665575307).

Almost surely, 2^5551917685 is an apocalyptic number.

It is an amenable number.

5551917685 is a deficient number, since it is larger than the sum of its proper divisors (1110383543).

5551917685 is a wasteful number, since it uses less digits than its factorization.

5551917685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110383542.

The product of its digits is 1890000, while the sum is 52.

The square root of 5551917685 is about 74511.1916761502. The cubic root of 5551917685 is about 1770.7109494617.

The spelling of 5551917685 in words is "five billion, five hundred fifty-one million, nine hundred seventeen thousand, six hundred eighty-five".