2551239977 has 16 divisors (see below), whose sum is σ = 3015676608. Its totient is φ = 2127746880.

The previous prime is 2551239967. The next prime is 2551240007. The reversal of 2551239977 is 7799321552.

It is a cyclic number.

It is not a de Polignac number, because 2551239977 - 2²² = 2547045673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2551239917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31418 + ... + 78035.

It is an arithmetic number, because the mean of its divisors is an integer number (188479788).

Almost surely, 2^2551239977 is an apocalyptic number.

It is an amenable number.

2551239977 is a deficient number, since it is larger than the sum of its proper divisors (464436631).

2551239977 is a wasteful number, since it uses less digits than its factorization.

2551239977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109640.

The product of its digits is 1190700, while the sum is 50.

The square root of 2551239977 is about 50509.8008014286. The cubic root of 2551239977 is about 1366.4186170150.

The spelling of 2551239977 in words is "two billion, five hundred fifty-one million, two hundred thirty-nine thousand, nine hundred seventy-seven".