25667231340 has 96 divisors (see below), whose sum is σ = 75158899200. Its totient is φ = 6532517376.

The previous prime is 25667231323. The next prime is 25667231393. The reversal of 25667231340 is 4313276652.

It is a super-2 number, since 2×25667231340² (a number of 22 digits) contains 22 as substring.

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, 610311 + ... + 651009.

It is an arithmetic number, because the mean of its divisors is an integer number (782905200).

Almost surely, 2^25667231340 is an apocalyptic number.

25667231340 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 25667231340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37579449600).

25667231340 is an abundant number, since it is smaller than the sum of its proper divisors (49491667860).

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

25667231340 is a wasteful number, since it uses less digits than its factorization.

25667231340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41191 (or 41189 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 39.

The spelling of 25667231340 in words is "twenty-five billion, six hundred sixty-seven million, two hundred thirty-one thousand, three hundred forty".