25571468934 has 288 divisors, whose sum is σ = 67934250720. Its totient is φ = 7118305920.

The previous prime is 25571468917. The next prime is 25571468959. The reversal of 25571468934 is 43986417552.

It is a happy number.

25571468934 is a `hidden beast` number, since 2 + 5 + 571 + 4 + 68 + 9 + 3 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 87274492 + ... + 87274784.

It is an arithmetic number, because the mean of its divisors is an integer number (235882815).

Almost surely, 2^25571468934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25571468934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33967125360).

25571468934 is an abundant number, since it is smaller than the sum of its proper divisors (42362781786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25571468934 is a wasteful number, since it uses less digits than its factorization.

25571468934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 365 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The spelling of 25571468934 in words is "twenty-five billion, five hundred seventy-one million, four hundred sixty-eight thousand, nine hundred thirty-four".