2505978956 has 12 divisors (see below), whose sum is σ = 4722806592. Its totient is φ = 1156605648.

The previous prime is 2505978919. The next prime is 2505978991. The reversal of 2505978956 is 6598795052.

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, 24095900 + ... + 24096003.

It is an arithmetic number, because the mean of its divisors is an integer number (393567216).

Almost surely, 2^2505978956 is an apocalyptic number.

2505978956 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2505978956 is a deficient number, since it is larger than the sum of its proper divisors (2216827636).

2505978956 is a wasteful number, since it uses less digits than its factorization.

2505978956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48191920 (or 48191918 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 56.

The square root of 2505978956 is about 50059.7538547684. The cubic root of 2505978956 is about 1358.2899058100.

The spelling of 2505978956 in words is "two billion, five hundred five million, nine hundred seventy-eight thousand, nine hundred fifty-six".