199612017342920 has 128 divisors (see below), whose sum is σ = 552777250314240. Its totient is φ = 63173283471360.

The previous prime is 199612017342917. The next prime is 199612017342949. The reversal of 199612017342920 is 29243710216991.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 481667000 + ... + 482081240.

It is an arithmetic number, because the mean of its divisors is an integer number (4318572268080).

Almost surely, 2^{199612017342920} is an apocalyptic number.

199612017342920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199612017342920 is an abundant number, since it is smaller than the sum of its proper divisors (353165232971320).

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

199612017342920 is a wasteful number, since it uses less digits than its factorization.

199612017342920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546655 (or 546651 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 56.

The spelling of 199612017342920 in words is "one hundred ninety-nine trillion, six hundred twelve billion, seventeen million, three hundred forty-two thousand, nine hundred twenty".