25171990272 has 540 divisors, whose sum is σ = 88800692904. Its totient is φ = 7030333440.

The previous prime is 25171990171. The next prime is 25171990273. The reversal of 25171990272 is 27209917152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25171990273) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 38547898 + ... + 38548550.

Almost surely, 2^25171990272 is an apocalyptic number.

25171990272 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25171990272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44400346452).

25171990272 is an abundant number, since it is smaller than the sum of its proper divisors (63628702632).

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

25171990272 is a wasteful number, since it uses less digits than its factorization.

25171990272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The spelling of 25171990272 in words is "twenty-five billion, one hundred seventy-one million, nine hundred ninety thousand, two hundred seventy-two".