25153152561 has 8 divisors (see below), whose sum is σ = 37263929760. Its totient is φ = 16768768356.

The previous prime is 25153152511. The next prime is 25153152571. The reversal of 25153152561 is 16525135152.

25153152561 is a `hidden beast` number, since 2 + 5 + 15 + 31 + 52 + 561 = 666.

It is not a de Polignac number, because 25153152561 - 2¹⁵ = 25153119793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25153152511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465799095 + ... + 465799148.

It is an arithmetic number, because the mean of its divisors is an integer number (4657991220).

Almost surely, 2^25153152561 is an apocalyptic number.

It is an amenable number.

25153152561 is a deficient number, since it is larger than the sum of its proper divisors (12110777199).

25153152561 is an equidigital number, since it uses as much as digits as its factorization.

25153152561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931598252 (or 931598246 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The spelling of 25153152561 in words is "twenty-five billion, one hundred fifty-three million, one hundred fifty-two thousand, five hundred sixty-one".