25991764383 has 8 divisors (see below), whose sum is σ = 37321507888. Its totient is φ = 15994931904.

The previous prime is 25991764367. The next prime is 25991764411. The reversal of 25991764383 is 38346719952.

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

It is not a de Polignac number, because 25991764383 - 2⁴ = 25991764367 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 (25991764333) 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, 333227710 + ... + 333227787.

It is an arithmetic number, because the mean of its divisors is an integer number (4665188486).

Almost surely, 2^25991764383 is an apocalyptic number.

25991764383 is a deficient number, since it is larger than the sum of its proper divisors (11329743505).

25991764383 is a wasteful number, since it uses less digits than its factorization.

25991764383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666455513.

The product of its digits is 9797760, while the sum is 57.

The spelling of 25991764383 in words is "twenty-five billion, nine hundred ninety-one million, seven hundred sixty-four thousand, three hundred eighty-three".