25491452671 has 8 divisors (see below), whose sum is σ = 25592127488. Its totient is φ = 25390827000.

The previous prime is 25491452647. The next prime is 25491452699. The reversal of 25491452671 is 17625419452.

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 25491452671 - 2¹⁷ = 25491321599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25491452641) 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, 1299466 + ... + 1318936.

It is an arithmetic number, because the mean of its divisors is an integer number (3199015936).

Almost surely, 2^25491452671 is an apocalyptic number.

25491452671 is a deficient number, since it is larger than the sum of its proper divisors (100674817).

25491452671 is a wasteful number, since it uses less digits than its factorization.

25491452671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24573.

The product of its digits is 604800, while the sum is 46.

The spelling of 25491452671 in words is "twenty-five billion, four hundred ninety-one million, four hundred fifty-two thousand, six hundred seventy-one".