25032991620 has 288 divisors, whose sum is σ = 91628990208. Its totient is φ = 5051870208.

The previous prime is 25032991619. The next prime is 25032991631. The reversal of 25032991620 is 2619923052.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 864822 + ... + 893298.

It is an arithmetic number, because the mean of its divisors is an integer number (318156216).

Almost surely, 2^25032991620 is an apocalyptic number.

25032991620 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 25032991620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45814495104).

25032991620 is an abundant number, since it is smaller than the sum of its proper divisors (66595998588).

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

25032991620 is a wasteful number, since it uses less digits than its factorization.

25032991620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28539 (or 28530 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 39.

The spelling of 25032991620 in words is "twenty-five billion, thirty-two million, nine hundred ninety-one thousand, six hundred twenty".