25912537973 has 4 divisors (see below), whose sum is σ = 29614329120. Its totient is φ = 22210746828.

The previous prime is 25912537969. The next prime is 25912538023. The reversal of 25912537973 is 37973521952.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25912537973 - 2² = 25912537969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25912537943) 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, 1850895563 + ... + 1850895576.

It is an arithmetic number, because the mean of its divisors is an integer number (7403582280).

Almost surely, 2^25912537973 is an apocalyptic number.

It is an amenable number.

25912537973 is a deficient number, since it is larger than the sum of its proper divisors (3701791147).

25912537973 is an equidigital number, since it uses as much as digits as its factorization.

25912537973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701791146.

The product of its digits is 3572100, while the sum is 53.

The spelling of 25912537973 in words is "twenty-five billion, nine hundred twelve million, five hundred thirty-seven thousand, nine hundred seventy-three".