199277311920 has 80 divisors (see below), whose sum is σ = 617913427200. Its totient is φ = 53127389952.

The previous prime is 199277311897. The next prime is 199277311921. The reversal of 199277311920 is 29113772991.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×199277311920² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199277311921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 882477 + ... + 1085043.

It is an arithmetic number, because the mean of its divisors is an integer number (7723917840).

Almost surely, 2^199277311920 is an apocalyptic number.

199277311920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199277311920 is an abundant number, since it is smaller than the sum of its proper divisors (418636115280).

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

199277311920 is a wasteful number, since it uses less digits than its factorization.

199277311920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206682 (or 206676 counting only the distinct ones).

The product of its (nonzero) digits is 428652, while the sum is 51.

The spelling of 199277311920 in words is "one hundred ninety-nine billion, two hundred seventy-seven million, three hundred eleven thousand, nine hundred twenty".