25565672601 has 32 divisors (see below), whose sum is σ = 43931873280. Its totient is φ = 14390904528.

The previous prime is 25565672597. The next prime is 25565672617. The reversal of 25565672601 is 10627656552.

25565672601 is a `hidden beast` number, since 2 + 5 + 565 + 67 + 26 + 0 + 1 = 666.

It is not a de Polignac number, because 25565672601 - 2² = 25565672597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25565672681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 996801 + ... + 1022126.

It is an arithmetic number, because the mean of its divisors is an integer number (1372871040).

Almost surely, 2^25565672601 is an apocalyptic number.

25565672601 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25565672601 is a deficient number, since it is larger than the sum of its proper divisors (18366200679).

25565672601 is a wasteful number, since it uses less digits than its factorization.

25565672601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019010 (or 2019004 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 25565672601 in words is "twenty-five billion, five hundred sixty-five million, six hundred seventy-two thousand, six hundred one".