199139912902 has 32 divisors (see below), whose sum is σ = 349656848640. Its totient is φ = 83300516640.

The previous prime is 199139912861. The next prime is 199139912903. The reversal of 199139912902 is 209219931991.

It is a super-2 number, since 2×199139912902² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199139912903) 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, 871624 + ... + 1076107.

It is an arithmetic number, because the mean of its divisors is an integer number (10926776520).

Almost surely, 2^199139912902 is an apocalyptic number.

199139912902 is a deficient number, since it is larger than the sum of its proper divisors (150516935738).

199139912902 is a wasteful number, since it uses less digits than its factorization.

199139912902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947916.

The product of its (nonzero) digits is 708588, while the sum is 55.

The spelling of 199139912902 in words is "one hundred ninety-nine billion, one hundred thirty-nine million, nine hundred twelve thousand, nine hundred two".