25342722440 has 64 divisors (see below), whose sum is σ = 65743781760. Its totient is φ = 8612029440.

The previous prime is 25342722439. The next prime is 25342722527. The reversal of 25342722440 is 4422724352.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 25342722440.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368846 + ... + 432125.

It is an arithmetic number, because the mean of its divisors is an integer number (1027246590).

Almost surely, 2^25342722440 is an apocalyptic number.

25342722440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25342722440 is an abundant number, since it is smaller than the sum of its proper divisors (40401059320).

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

25342722440 is a wasteful number, since it uses less digits than its factorization.

25342722440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801102 (or 801098 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 35.

The spelling of 25342722440 in words is "twenty-five billion, three hundred forty-two million, seven hundred twenty-two thousand, four hundred forty".