2170396166400 has 1620 divisors, whose sum is σ = 10082960232576. Its totient is φ = 450900172800.

The previous prime is 2170396166387. The next prime is 2170396166417. The reversal of 2170396166400 is 46616930712.

2170396166400 is a `hidden beast` number, since 21 + 7 + 0 + 3 + 9 + 616 + 6 + 4 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1620).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 439082329 + ... + 439087271.

Almost surely, 2^{2170396166400} is an apocalyptic number.

2170396166400 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 2170396166400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5041480116288).

2170396166400 is an abundant number, since it is smaller than the sum of its proper divisors (7912564066176).

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

2170396166400 is a wasteful number, since it uses less digits than its factorization.

2170396166400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5010 (or 4971 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 2170396166400 in words is "two trillion, one hundred seventy billion, three hundred ninety-six million, one hundred sixty-six thousand, four hundred".