25146665460 has 168 divisors, whose sum is σ = 90486969216. Its totient is φ = 5747785920.

The previous prime is 25146665431. The next prime is 25146665497. The reversal of 25146665460 is 6456664152.

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 55 ways as a sum of consecutive naturals, for example, 21136 + ... + 225255.

It is an arithmetic number, because the mean of its divisors is an integer number (538612912).

Almost surely, 2^25146665460 is an apocalyptic number.

25146665460 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 25146665460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45243484608).

25146665460 is an abundant number, since it is smaller than the sum of its proper divisors (65340303756).

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

25146665460 is a wasteful number, since it uses less digits than its factorization.

25146665460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246425 (or 246408 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 25146665460 in words is "twenty-five billion, one hundred forty-six million, six hundred sixty-five thousand, four hundred sixty".