25138913763 has 4 divisors (see below), whose sum is σ = 33518551688. Its totient is φ = 16759275840.

The previous prime is 25138913749. The next prime is 25138913771. The reversal of 25138913763 is 36731983152.

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

It is not a de Polignac number, because 25138913763 - 2¹⁶ = 25138848227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25138913363) 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 3 ways as a sum of consecutive naturals, for example, 4189818958 + ... + 4189818963.

It is an arithmetic number, because the mean of its divisors is an integer number (8379637922).

Almost surely, 2^25138913763 is an apocalyptic number.

25138913763 is a deficient number, since it is larger than the sum of its proper divisors (8379637925).

25138913763 is an equidigital number, since it uses as much as digits as its factorization.

25138913763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8379637924.

The product of its digits is 816480, while the sum is 48.

The spelling of 25138913763 in words is "twenty-five billion, one hundred thirty-eight million, nine hundred thirteen thousand, seven hundred sixty-three".