199990144342 has 16 divisors (see below), whose sum is σ = 304349663232. Its totient is φ = 98550685800.

The previous prime is 199990144337. The next prime is 199990144351. The reversal of 199990144342 is 243441099991.

It is a super-2 number, since 2×199990144342² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2568808 + ... + 2645515.

It is an arithmetic number, because the mean of its divisors is an integer number (19021853952).

Almost surely, 2^199990144342 is an apocalyptic number.

199990144342 is a deficient number, since it is larger than the sum of its proper divisors (104359518890).

199990144342 is a wasteful number, since it uses less digits than its factorization.

199990144342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5214603.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The spelling of 199990144342 in words is "one hundred ninety-nine billion, nine hundred ninety million, one hundred forty-four thousand, three hundred forty-two".