25451025040 has 160 divisors (see below), whose sum is σ = 71985106944. Its totient is φ = 8169185280.

The previous prime is 25451025001. The next prime is 25451025071. The reversal of 25451025040 is 4052015452.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1811322 + ... + 1825318.

Almost surely, 2^25451025040 is an apocalyptic number.

25451025040 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 25451025040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35992553472).

25451025040 is an abundant number, since it is smaller than the sum of its proper divisors (46534081904).

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

25451025040 is a wasteful number, since it uses less digits than its factorization.

25451025040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14225 (or 14219 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The spelling of 25451025040 in words is "twenty-five billion, four hundred fifty-one million, twenty-five thousand, forty".