2157220796880 has 320 divisors, whose sum is σ = 7080026849280. Its totient is φ = 542254952448.

The previous prime is 2157220796821. The next prime is 2157220797013. The reversal of 2157220796880 is 886970227512.

It is a self number, because there is not a number n which added to its sum of digits gives 2157220796880.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 150815809 + ... + 150830111.

It is an arithmetic number, because the mean of its divisors is an integer number (22125083904).

Almost surely, 2^{2157220796880} is an apocalyptic number.

2157220796880 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 2157220796880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3540013424640).

2157220796880 is an abundant number, since it is smaller than the sum of its proper divisors (4922806052400).

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

2157220796880 is a wasteful number, since it uses less digits than its factorization.

2157220796880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14738 (or 14732 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 57.

The spelling of 2157220796880 in words is "two trillion, one hundred fifty-seven billion, two hundred twenty million, seven hundred ninety-six thousand, eight hundred eighty".