25951157138 has 8 divisors (see below), whose sum is σ = 39024789132. Its totient is φ = 12942894096.

The previous prime is 25951157129. The next prime is 25951157147. The reversal of 25951157138 is 83175115952.

It is an interprime number because it is at equal distance from previous prime (25951157129) and next prime (25951157147).

It can be written as a sum of positive squares in 2 ways, for example, as 23770547329 + 2180609809 = 154177^2 + 46697^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 25951157092 and 25951157101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16341245 + ... + 16342832.

Almost surely, 2^25951157138 is an apocalyptic number.

25951157138 is a deficient number, since it is larger than the sum of its proper divisors (13073631994).

25951157138 is a wasteful number, since it uses less digits than its factorization.

25951157138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32684476.

The product of its digits is 378000, while the sum is 47.

The spelling of 25951157138 in words is "twenty-five billion, nine hundred fifty-one million, one hundred fifty-seven thousand, one hundred thirty-eight".