25540341931 has 8 divisors (see below), whose sum is σ = 27509467104. Its totient is φ = 23571857280.

The previous prime is 25540341923. The next prime is 25540341943. The reversal of 25540341931 is 13914304552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25540341931 - 2³ = 25540341923 is a prime.

It is a super-3 number, since 3×25540341931³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25540341961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75655 + ... + 238336.

It is an arithmetic number, because the mean of its divisors is an integer number (3438683388).

Almost surely, 2^25540341931 is an apocalyptic number.

25540341931 is a deficient number, since it is larger than the sum of its proper divisors (1969125173).

25540341931 is a wasteful number, since it uses less digits than its factorization.

25540341931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320261.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 25540341931 in words is "twenty-five billion, five hundred forty million, three hundred forty-one thousand, nine hundred thirty-one".