25385856458 has 8 divisors (see below), whose sum is σ = 40318713252. Its totient is φ = 11946285376.

The previous prime is 25385856451. The next prime is 25385856467. The reversal of 25385856458 is 85465858352.

It can be written as a sum of positive squares in 2 ways, for example, as 23912601769 + 1473254689 = 154637^2 + 38383^2 .

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 = 25385856397 and 25385856406.

It is not an unprimeable number, because it can be changed into a prime (25385856451) 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, 373321385 + ... + 373321452.

Almost surely, 2^25385856458 is an apocalyptic number.

25385856458 is a deficient number, since it is larger than the sum of its proper divisors (14932856794).

25385856458 is a wasteful number, since it uses less digits than its factorization.

25385856458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746642856.

The product of its digits is 46080000, while the sum is 59.

The spelling of 25385856458 in words is "twenty-five billion, three hundred eighty-five million, eight hundred fifty-six thousand, four hundred fifty-eight".