25346959440 has 160 divisors (see below), whose sum is σ = 86374328832. Its totient is φ = 6097728000.

The previous prime is 25346959411. The next prime is 25346959453. The reversal of 25346959440 is 4495964352.

It is a super-2 number, since 2×25346959440² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 309195 + ... + 382485.

Almost surely, 2^25346959440 is an apocalyptic number.

25346959440 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 25346959440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43187164416).

25346959440 is an abundant number, since it is smaller than the sum of its proper divisors (61027369392).

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

25346959440 is a wasteful number, since it uses less digits than its factorization.

25346959440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73449 (or 73443 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 51.

The spelling of 25346959440 in words is "twenty-five billion, three hundred forty-six million, nine hundred fifty-nine thousand, four hundred forty".