25650812256491 has 32 divisors (see below), whose sum is σ = 26693284546560. Its totient is φ = 24622610688000.

The previous prime is 25650812256467. The next prime is 25650812256523. The reversal of 25650812256491 is 19465221805652.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25650812256491 is a prime.

It is a super-3 number, since 3×25650812256491³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25650812256691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6331968416 + ... + 6331972466.

It is an arithmetic number, because the mean of its divisors is an integer number (834165142080).

Almost surely, 2^{25650812256491} is an apocalyptic number.

25650812256491 is a deficient number, since it is larger than the sum of its proper divisors (1042472290069).

25650812256491 is a wasteful number, since it uses less digits than its factorization.

25650812256491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7107.

The product of its (nonzero) digits is 10368000, while the sum is 56.

The spelling of 25650812256491 in words is "twenty-five trillion, six hundred fifty billion, eight hundred twelve million, two hundred fifty-six thousand, four hundred ninety-one".