25447634157 has 32 divisors (see below), whose sum is σ = 37152872064. Its totient is φ = 15365376000.

The previous prime is 25447634153. The next prime is 25447634167. The reversal of 25447634157 is 75143674452.

It is not a de Polignac number, because 25447634157 - 2² = 25447634153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25447634153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19559407 + ... + 19560707.

It is an arithmetic number, because the mean of its divisors is an integer number (1161027252).

Almost surely, 2^25447634157 is an apocalyptic number.

It is an amenable number.

25447634157 is a deficient number, since it is larger than the sum of its proper divisors (11705237907).

25447634157 is a wasteful number, since it uses less digits than its factorization.

25447634157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3069.

The product of its digits is 2822400, while the sum is 48.

The spelling of 25447634157 in words is "twenty-five billion, four hundred forty-seven million, six hundred thirty-four thousand, one hundred fifty-seven".