25172386849 has 8 divisors (see below), whose sum is σ = 25986348800. Its totient is φ = 24358546800.

The previous prime is 25172386807. The next prime is 25172386859. The reversal of 25172386849 is 94868327152.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25172386849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25172386849.

It is not an unprimeable number, because it can be changed into a prime (25172386859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590059 + ... + 631279.

It is an arithmetic number, because the mean of its divisors is an integer number (3248293600).

Almost surely, 2^25172386849 is an apocalyptic number.

It is an amenable number.

25172386849 is a deficient number, since it is larger than the sum of its proper divisors (813961951).

25172386849 is a wasteful number, since it uses less digits than its factorization.

25172386849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60951.

The product of its digits is 5806080, while the sum is 55.

The spelling of 25172386849 in words is "twenty-five billion, one hundred seventy-two million, three hundred eighty-six thousand, eight hundred forty-nine".