2155877566 has 8 divisors (see below), whose sum is σ = 3248062920. Its totient is φ = 1073189928.

The previous prime is 2155877551. The next prime is 2155877657. The reversal of 2155877566 is 6657785512.

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

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, 2373861 + ... + 2374768.

It is an arithmetic number, because the mean of its divisors is an integer number (406007865).

Almost surely, 2^2155877566 is an apocalyptic number.

2155877566 is a deficient number, since it is larger than the sum of its proper divisors (1092185354).

2155877566 is a wasteful number, since it uses less digits than its factorization.

2155877566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4748858.

The product of its digits is 3528000, while the sum is 52.

The square root of 2155877566 is about 46431.4286448306. The cubic root of 2155877566 is about 1291.8379278117.

The spelling of 2155877566 in words is "two billion, one hundred fifty-five million, eight hundred seventy-seven thousand, five hundred sixty-six".