25439901923 has 8 divisors (see below), whose sum is σ = 27509481792. Its totient is φ = 23434001536.

The previous prime is 25439901899. The next prime is 25439901931. The reversal of 25439901923 is 32910993452.

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

It is a cyclic number.

It is not a de Polignac number, because 25439901923 - 2¹² = 25439897827 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25439906923) 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, 15919040 + ... + 15920637.

It is an arithmetic number, because the mean of its divisors is an integer number (3438685224).

Almost surely, 2^25439901923 is an apocalyptic number.

25439901923 is a deficient number, since it is larger than the sum of its proper divisors (2069579869).

25439901923 is a wasteful number, since it uses less digits than its factorization.

25439901923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31839741.

The product of its (nonzero) digits is 524880, while the sum is 47.

The spelling of 25439901923 in words is "twenty-five billion, four hundred thirty-nine million, nine hundred one thousand, nine hundred twenty-three".