25634940763 has 4 divisors (see below), whose sum is σ = 26461874368. Its totient is φ = 24808007160.

The previous prime is 25634940719. The next prime is 25634940841. The reversal of 25634940763 is 36704943652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25634940763 - 2¹⁷ = 25634809691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25634940703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413466756 + ... + 413466817.

It is an arithmetic number, because the mean of its divisors is an integer number (6615468592).

Almost surely, 2^25634940763 is an apocalyptic number.

25634940763 is a deficient number, since it is larger than the sum of its proper divisors (826933605).

25634940763 is an equidigital number, since it uses as much as digits as its factorization.

25634940763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826933604.

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 25634940763 in words is "twenty-five billion, six hundred thirty-four million, nine hundred forty thousand, seven hundred sixty-three".