161970459300 has 504 divisors, whose sum is σ = 570481023336. Its totient is φ = 39661332480.

The previous prime is 161970459251. The next prime is 161970459307. The reversal of 161970459300 is 3954079161.

161970459300 is a `hidden beast` number, since 1 + 6 + 197 + 0 + 459 + 3 + 0 + 0 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 142394531904 + 19575927396 = 377352^2 + 139914^2 .

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

It is not an unprimeable number, because it can be changed into a prime (161970459307) by changing a digit.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 262512592 + ... + 262513208.

Almost surely, 2^161970459300 is an apocalyptic number.

161970459300 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 161970459300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285240511668).

161970459300 is an abundant number, since it is smaller than the sum of its proper divisors (408510564036).

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

161970459300 is a wasteful number, since it uses less digits than its factorization.

161970459300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 161970459300 in words is "one hundred sixty-one billion, nine hundred seventy million, four hundred fifty-nine thousand, three hundred".