25117417903 has 4 divisors (see below), whose sum is σ = 25230052288. Its totient is φ = 25004783520.

The previous prime is 25117417901. The next prime is 25117417967. The reversal of 25117417903 is 30971471152.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25117417903 - 2¹ = 25117417901 is a prime.

It is a super-2 number, since 2×25117417903² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25117417901) 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, 56316858 + ... + 56317303.

It is an arithmetic number, because the mean of its divisors is an integer number (6307513072).

Almost surely, 2^25117417903 is an apocalyptic number.

25117417903 is a deficient number, since it is larger than the sum of its proper divisors (112634385).

25117417903 is a wasteful number, since it uses less digits than its factorization.

25117417903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112634384.

The product of its (nonzero) digits is 52920, while the sum is 40.

The spelling of 25117417903 in words is "twenty-five billion, one hundred seventeen million, four hundred seventeen thousand, nine hundred three".