25172314782 has 8 divisors (see below), whose sum is σ = 50344629576. Its totient is φ = 8390771592.

The previous prime is 25172314771. The next prime is 25172314793. The reversal of 25172314782 is 28741327152.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25172314771) and next prime (25172314793).

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

25172314782 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2097692893 + ... + 2097692904.

It is an arithmetic number, because the mean of its divisors is an integer number (6293078697).

Almost surely, 2^25172314782 is an apocalyptic number.

25172314782 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25172314782 is a wasteful number, since it uses less digits than its factorization.

25172314782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4195385802.

The product of its digits is 188160, while the sum is 42.

The spelling of 25172314782 in words is "twenty-five billion, one hundred seventy-two million, three hundred fourteen thousand, seven hundred eighty-two".