25297978741 has 32 divisors (see below), whose sum is σ = 30198333440. Its totient is φ = 20744470656.

The previous prime is 25297978729. The next prime is 25297978751. The reversal of 25297978741 is 14787979252.

It is not a de Polignac number, because 25297978741 - 2¹⁷ = 25297847669 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25297978741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25297978721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3015745 + ... + 3024121.

It is an arithmetic number, because the mean of its divisors is an integer number (943697920).

Almost surely, 2^25297978741 is an apocalyptic number.

It is an amenable number.

25297978741 is a deficient number, since it is larger than the sum of its proper divisors (4900354699).

25297978741 is a wasteful number, since it uses less digits than its factorization.

25297978741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8633.

The product of its digits is 17781120, while the sum is 61.

The spelling of 25297978741 in words is "twenty-five billion, two hundred ninety-seven million, nine hundred seventy-eight thousand, seven hundred forty-one".