25781450097 has 8 divisors (see below), whose sum is σ = 37019518144. Its totient is φ = 15865507728.

The previous prime is 25781450087. The next prime is 25781450117. The reversal of 25781450097 is 79005418752.

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

It is not a de Polignac number, because 25781450097 - 2¹⁰ = 25781449073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25781450047) 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, 330531373 + ... + 330531450.

It is an arithmetic number, because the mean of its divisors is an integer number (4627439768).

Almost surely, 2^25781450097 is an apocalyptic number.

It is an amenable number.

25781450097 is a deficient number, since it is larger than the sum of its proper divisors (11238068047).

25781450097 is a wasteful number, since it uses less digits than its factorization.

25781450097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661062839.

The product of its (nonzero) digits is 705600, while the sum is 48.

The spelling of 25781450097 in words is "twenty-five billion, seven hundred eighty-one million, four hundred fifty thousand, ninety-seven".