25970574538 has 4 divisors (see below), whose sum is σ = 38955861810. Its totient is φ = 12985287268.

The previous prime is 25970574449. The next prime is 25970574547. The reversal of 25970574538 is 83547507952.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24535149769 + 1435424769 = 156637^2 + 37887^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6492643633 + ... + 6492643636.

Almost surely, 2^25970574538 is an apocalyptic number.

25970574538 is a deficient number, since it is larger than the sum of its proper divisors (12985287272).

25970574538 is a wasteful number, since it uses less digits than its factorization.

25970574538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12985287271.

The product of its (nonzero) digits is 10584000, while the sum is 55.

The spelling of 25970574538 in words is "twenty-five billion, nine hundred seventy million, five hundred seventy-four thousand, five hundred thirty-eight".