199145843040 has 96 divisors (see below), whose sum is σ = 660325720320. Its totient is φ = 50310526464.

The previous prime is 199145843023. The next prime is 199145843077. The reversal of 199145843040 is 40348541991.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×199145843040² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10908964 + ... + 10927203.

It is an arithmetic number, because the mean of its divisors is an integer number (6878392920).

Almost surely, 2^199145843040 is an apocalyptic number.

199145843040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199145843040 is an abundant number, since it is smaller than the sum of its proper divisors (461179877280).

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

199145843040 is a wasteful number, since it uses less digits than its factorization.

199145843040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21836204 (or 21836196 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 199145843040 in words is "one hundred ninety-nine billion, one hundred forty-five million, eight hundred forty-three thousand, forty".