25616138723 has 8 divisors (see below), whose sum is σ = 29544171360. Its totient is φ = 21755252160.

The previous prime is 25616138699. The next prime is 25616138729. The reversal of 25616138723 is 32783161652.

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 25616138723 - 2⁶ = 25616138659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25616138729) 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, 16785698 + ... + 16787223.

It is an arithmetic number, because the mean of its divisors is an integer number (3693021420).

Almost surely, 2^25616138723 is an apocalyptic number.

25616138723 is a deficient number, since it is larger than the sum of its proper divisors (3928032637).

25616138723 is a wasteful number, since it uses less digits than its factorization.

25616138723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33573037.

The product of its digits is 362880, while the sum is 44.

The spelling of 25616138723 in words is "twenty-five billion, six hundred sixteen million, one hundred thirty-eight thousand, seven hundred twenty-three".