25326492985 has 32 divisors (see below), whose sum is σ = 33964824960. Its totient is φ = 18016846848.

The previous prime is 25326492979. The next prime is 25326493009. The reversal of 25326492985 is 58929462352.

It is a cyclic number.

It is not a de Polignac number, because 25326492985 - 2¹⁵ = 25326460217 is a prime.

It is a super-3 number, since 3×25326492985³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 581374 + ... + 623416.

It is an arithmetic number, because the mean of its divisors is an integer number (1061400780).

Almost surely, 2^25326492985 is an apocalyptic number.

It is an amenable number.

25326492985 is a deficient number, since it is larger than the sum of its proper divisors (8638331975).

25326492985 is a wasteful number, since it uses less digits than its factorization.

25326492985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42457.

The product of its digits is 9331200, while the sum is 55.

The spelling of 25326492985 in words is "twenty-five billion, three hundred twenty-six million, four hundred ninety-two thousand, nine hundred eighty-five".