25939893951 has 16 divisors (see below), whose sum is σ = 38432020320. Its totient is φ = 17292116160.

The previous prime is 25939893937. The next prime is 25939894003. The reversal of 25939893951 is 15939893952.

25939893951 is a `hidden beast` number, since 2 + 593 + 9 + 8 + 9 + 39 + 5 + 1 = 666.

It is not a de Polignac number, because 25939893951 - 2¹⁷ = 25939762879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25939898951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 642811 + ... + 681971.

It is an arithmetic number, because the mean of its divisors is an integer number (2402001270).

Almost surely, 2^25939893951 is an apocalyptic number.

25939893951 is a deficient number, since it is larger than the sum of its proper divisors (12492126369).

25939893951 is a wasteful number, since it uses less digits than its factorization.

25939893951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63703 (or 63697 counting only the distinct ones).

The product of its digits is 23619600, while the sum is 63.

Subtracting from 25939893951 its reverse (15939893952), we obtain a palindrome (9999999999).

The spelling of 25939893951 in words is "twenty-five billion, nine hundred thirty-nine million, eight hundred ninety-three thousand, nine hundred fifty-one".