16977321900 has 576 divisors, whose sum is σ = 68688936960. Its totient is φ = 3494534400.

The previous prime is 16977321857. The next prime is 16977321917. The reversal of 16977321900 is 912377961.

It is a super-2 number, since 2×16977321900² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 26402979 + ... + 26403621.

Almost surely, 2^16977321900 is an apocalyptic number.

16977321900 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 16977321900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34344468480).

16977321900 is an abundant number, since it is smaller than the sum of its proper divisors (51711615060).

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

16977321900 is a wasteful number, since it uses less digits than its factorization.

16977321900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 798 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The spelling of 16977321900 in words is "sixteen billion, nine hundred seventy-seven million, three hundred twenty-one thousand, nine hundred".