27172792920 has 512 divisors, whose sum is σ = 103115980800. Its totient is φ = 5576491008.

The previous prime is 27172792883. The next prime is 27172792937. The reversal of 27172792920 is 2929727172.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 27172792920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 70947049 + ... + 70947431.

It is an arithmetic number, because the mean of its divisors is an integer number (201398400).

Almost surely, 2^27172792920 is an apocalyptic number.

27172792920 is a gapful number since it is divisible by the number (20) 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 27172792920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51557990400).

27172792920 is an abundant number, since it is smaller than the sum of its proper divisors (75943187880).

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

27172792920 is a wasteful number, since it uses less digits than its factorization.

27172792920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 575 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 48.

The spelling of 27172792920 in words is "twenty-seven billion, one hundred seventy-two million, seven hundred ninety-two thousand, nine hundred twenty".