25155978741 has 6 divisors (see below), whose sum is σ = 36336413750. Its totient is φ = 16770652488.

The previous prime is 25155978733. The next prime is 25155978763. The reversal of 25155978741 is 14787955152.

25155978741 is a `hidden beast` number, since 2 + 5 + 1 + 5 + 597 + 8 + 7 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18463102641 + 6692876100 = 135879^2 + 81810^2 .

It is not a de Polignac number, because 25155978741 - 2³ = 25155978733 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 (25155978721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1397554366 + ... + 1397554383.

Almost surely, 2^25155978741 is an apocalyptic number.

It is an amenable number.

25155978741 is a deficient number, since it is larger than the sum of its proper divisors (11180435009).

25155978741 is a wasteful number, since it uses less digits than its factorization.

25155978741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795108755 (or 2795108752 counting only the distinct ones).

The product of its digits is 3528000, while the sum is 54.

The spelling of 25155978741 in words is "twenty-five billion, one hundred fifty-five million, nine hundred seventy-eight thousand, seven hundred forty-one".