25914402990 has 192 divisors, whose sum is σ = 79234122240. Its totient is φ = 5752270080.

The previous prime is 25914402967. The next prime is 25914402991. The reversal of 25914402990 is 9920441952.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25914402991) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23752345 + ... + 23753435.

It is an arithmetic number, because the mean of its divisors is an integer number (412677720).

Almost surely, 2^25914402990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25914402990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39617061120).

25914402990 is an abundant number, since it is smaller than the sum of its proper divisors (53319719250).

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

25914402990 is a wasteful number, since it uses less digits than its factorization.

25914402990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167 (or 2164 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 25914402990 in words is "twenty-five billion, nine hundred fourteen million, four hundred two thousand, nine hundred ninety".