25787330117 has 4 divisors (see below), whose sum is σ = 25890068736. Its totient is φ = 25684591500.

The previous prime is 25787330099. The next prime is 25787330131. The reversal of 25787330117 is 71103378752.

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 25787330117 - 2²⁰ = 25786281541 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 (25787330197) 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, 51368933 + ... + 51369434.

It is an arithmetic number, because the mean of its divisors is an integer number (6472517184).

Almost surely, 2^25787330117 is an apocalyptic number.

It is an amenable number.

25787330117 is a deficient number, since it is larger than the sum of its proper divisors (102738619).

25787330117 is a wasteful number, since it uses less digits than its factorization.

25787330117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102738618.

The product of its (nonzero) digits is 246960, while the sum is 44.

The spelling of 25787330117 in words is "twenty-five billion, seven hundred eighty-seven million, three hundred thirty thousand, one hundred seventeen".