25734025491 has 8 divisors (see below), whose sum is σ = 34522537920. Its totient is φ = 17050765032.

The previous prime is 25734025459. The next prime is 25734025517. The reversal of 25734025491 is 19452043752.

It is a happy number.

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

It is not a de Polignac number, because 25734025491 - 2⁵ = 25734025459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25734025591) 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, 26312421 + ... + 26313398.

It is an arithmetic number, because the mean of its divisors is an integer number (4315317240).

Almost surely, 2^25734025491 is an apocalyptic number.

25734025491 is a deficient number, since it is larger than the sum of its proper divisors (8788512429).

25734025491 is a wasteful number, since it uses less digits than its factorization.

25734025491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52625985.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 25734025491 in words is "twenty-five billion, seven hundred thirty-four million, twenty-five thousand, four hundred ninety-one".