5155445661 has 8 divisors (see below), whose sum is σ = 6892066080. Its totient is φ = 3427894512.

The previous prime is 5155445629. The next prime is 5155445723. The reversal of 5155445661 is 1665445515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5155445661 - 2⁵ = 5155445629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5155445621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2265990 + ... + 2268263.

It is an arithmetic number, because the mean of its divisors is an integer number (861508260).

Almost surely, 2^5155445661 is an apocalyptic number.

It is an amenable number.

5155445661 is a deficient number, since it is larger than the sum of its proper divisors (1736620419).

5155445661 is a wasteful number, since it uses less digits than its factorization.

5155445661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4534635.

The product of its digits is 360000, while the sum is 42.

The square root of 5155445661 is about 71801.4321653823. The cubic root of 5155445661 is about 1727.5159713500.

The spelling of 5155445661 in words is "five billion, one hundred fifty-five million, four hundred forty-five thousand, six hundred sixty-one".