12777650025 has 24 divisors (see below), whose sum is σ = 24143674944. Its totient is φ = 5841211200.

The previous prime is 12777650021. The next prime is 12777650027. The reversal of 12777650025 is 52005677721.

It is not a de Polignac number, because 12777650025 - 2² = 12777650021 is a prime.

It is a super-2 number, since 2×12777650025² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12777650021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12168666 + ... + 12169715.

It is an arithmetic number, because the mean of its divisors is an integer number (1005986456).

Almost surely, 2^12777650025 is an apocalyptic number.

12777650025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12777650025 is a deficient number, since it is larger than the sum of its proper divisors (11366024919).

12777650025 is a wasteful number, since it uses less digits than its factorization.

12777650025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24338401 (or 24338396 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 42.

The spelling of 12777650025 in words is "twelve billion, seven hundred seventy-seven million, six hundred fifty thousand, twenty-five".