25047249985 has 8 divisors (see below), whose sum is σ = 31638631680. Its totient is φ = 18983178864.

The previous prime is 25047249979. The next prime is 25047250013. The reversal of 25047249985 is 58994274052.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25047249985 - 2²¹ = 25045152833 is a prime.

It is a super-3 number, since 3×25047249985³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131827537 + ... + 131827726.

It is an arithmetic number, because the mean of its divisors is an integer number (3954828960).

Almost surely, 2^25047249985 is an apocalyptic number.

It is an amenable number.

25047249985 is a deficient number, since it is larger than the sum of its proper divisors (6591381695).

25047249985 is a wasteful number, since it uses less digits than its factorization.

25047249985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263655287.

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 25047249985 in words is "twenty-five billion, forty-seven million, two hundred forty-nine thousand, nine hundred eighty-five".