25534498500 has 576 divisors, whose sum is σ = 96523714560. Its totient is φ = 5559840000.

The previous prime is 25534498481. The next prime is 25534498519. The reversal of 25534498500 is 589443552.

25534498500 is a `hidden beast` number, since 2 + 5 + 53 + 4 + 4 + 98 + 500 = 666.

It is an interprime number because it is at equal distance from previous prime (25534498481) and next prime (25534498519).

It is a super-2 number, since 2×25534498500² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 191 ways as a sum of consecutive naturals, for example, 77143335 + ... + 77143665.

Almost surely, 2^25534498500 is an apocalyptic number.

25534498500 is a gapful number since it is divisible by the number (20) 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 25534498500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48261857280).

25534498500 is an abundant number, since it is smaller than the sum of its proper divisors (70989216060).

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

25534498500 is a wasteful number, since it uses less digits than its factorization.

25534498500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 25534498500 in words is "twenty-five billion, five hundred thirty-four million, four hundred ninety-eight thousand, five hundred".