25103779989 has 8 divisors (see below), whose sum is σ = 33475015392. Its totient is φ = 16734198960.

The previous prime is 25103779969. The next prime is 25103780003. The reversal of 25103779989 is 98997730152.

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

It is not a de Polignac number, because 25103779989 - 2²⁸ = 24835344533 is a prime.

It is a super-2 number, since 2×25103779989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25103779969) 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, 377742 + ... + 439199.

It is an arithmetic number, because the mean of its divisors is an integer number (4184376924).

Almost surely, 2^25103779989 is an apocalyptic number.

It is an amenable number.

25103779989 is a deficient number, since it is larger than the sum of its proper divisors (8371235403).

25103779989 is a wasteful number, since it uses less digits than its factorization.

25103779989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827187.

The product of its (nonzero) digits is 8573040, while the sum is 60.

The spelling of 25103779989 in words is "twenty-five billion, one hundred three million, seven hundred seventy-nine thousand, nine hundred eighty-nine".