25031557980 has 960 divisors, whose sum is σ = 99994245120. Its totient is φ = 5193745920.

The previous prime is 25031557927. The next prime is 25031558009. The reversal of 25031557980 is 8975513052.

25031557980 is a `hidden beast` number, since 2 + 5 + 0 + 3 + 1 + 557 + 98 + 0 = 666.

It is a super-2 number, since 2×25031557980² (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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 532586317 + ... + 532586363.

It is an arithmetic number, because the mean of its divisors is an integer number (104160672).

Almost surely, 2^25031557980 is an apocalyptic number.

25031557980 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 25031557980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49997122560).

25031557980 is an abundant number, since it is smaller than the sum of its proper divisors (74962687140).

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

25031557980 is a wasteful number, since it uses less digits than its factorization.

25031557980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The spelling of 25031557980 in words is "twenty-five billion, thirty-one million, five hundred fifty-seven thousand, nine hundred eighty".