25498571904 has 320 divisors, whose sum is σ = 83945594040. Its totient is φ = 7632175104.

The previous prime is 25498571893. The next prime is 25498571911. The reversal of 25498571904 is 40917589452.

It is a happy number.

25498571904 is a `hidden beast` number, since 2 + 549 + 8 + 5 + 7 + 1 + 90 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14823549504 + 10675022400 = 121752^2 + 103320^2 .

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 39 ways as a sum of consecutive naturals, for example, 4984452 + ... + 4989564.

Almost surely, 2^25498571904 is an apocalyptic number.

25498571904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25498571904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41972797020).

25498571904 is an abundant number, since it is smaller than the sum of its proper divisors (58447022136).

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

25498571904 is a wasteful number, since it uses less digits than its factorization.

25498571904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5189 (or 5168 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 25498571904 in words is "twenty-five billion, four hundred ninety-eight million, five hundred seventy-one thousand, nine hundred four".