199534743694734 has 64 divisors (see below), whose sum is σ = 471285666385920. Its totient is φ = 55113004719360.

The previous prime is 199534743694687. The next prime is 199534743694763. The reversal of 199534743694734 is 437496347435991.

It is a super-2 number, since 2×199534743694734² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 199534743694734.

It is a congruent number.

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, 79164489 + ... + 81646100.

It is an arithmetic number, because the mean of its divisors is an integer number (7363838537280).

Almost surely, 2^{199534743694734} is an apocalyptic number.

199534743694734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

199534743694734 is an abundant number, since it is smaller than the sum of its proper divisors (271750922691186).

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

199534743694734 is a wasteful number, since it uses less digits than its factorization.

199534743694734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160811585.

The product of its digits is 7407106560, while the sum is 78.

The spelling of 199534743694734 in words is "one hundred ninety-nine trillion, five hundred thirty-four billion, seven hundred forty-three million, six hundred ninety-four thousand, seven hundred thirty-four".