25791181772 has 6 divisors (see below), whose sum is σ = 45134568108. Its totient is φ = 12895590884.

The previous prime is 25791181771. The next prime is 25791181783. The reversal of 25791181772 is 27718119752.

It is a self number, because there is not a number n which added to its sum of digits gives 25791181772.

It is not an unprimeable number, because it can be changed into a prime (25791181771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3223897718 + ... + 3223897725.

It is an arithmetic number, because the mean of its divisors is an integer number (7522428018).

Almost surely, 2^25791181772 is an apocalyptic number.

It is an amenable number.

25791181772 is a deficient number, since it is larger than the sum of its proper divisors (19343386336).

25791181772 is a wasteful number, since it uses less digits than its factorization.

25791181772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6447795447 (or 6447795445 counting only the distinct ones).

The product of its digits is 493920, while the sum is 50.

The spelling of 25791181772 in words is "twenty-five billion, seven hundred ninety-one million, one hundred eighty-one thousand, seven hundred seventy-two".