17977700000 has 144 divisors (see below), whose sum is σ = 47645622360. Its totient is φ = 6637440000.

The previous prime is 17977699997. The next prime is 17977700051. The reversal of 17977700000 is 777971.

It can be written as a sum of positive squares in 12 ways, for example, as 14783641744 + 3194058256 = 121588^2 + 56516^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1293086 + ... + 1306914.

Almost surely, 2^17977700000 is an apocalyptic number.

17977700000 is a gapful number since it is divisible by the number (10) 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 17977700000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23822811180).

17977700000 is an abundant number, since it is smaller than the sum of its proper divisors (29667922360).

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

17977700000 is an equidigital number, since it uses as much as digits as its factorization.

17977700000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13877 (or 13849 counting only the distinct ones).

The product of its (nonzero) digits is 21609, while the sum is 38.

The spelling of 17977700000 in words is "seventeen billion, nine hundred seventy-seven million, seven hundred thousand".