199434133965 has 64 divisors (see below), whose sum is σ = 368715214080. Its totient is φ = 90973962240.

The previous prime is 199434133963. The next prime is 199434133979. The reversal of 199434133965 is 569331434991.

It is a happy number.

It is not a de Polignac number, because 199434133965 - 2¹ = 199434133963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199434133963) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8653137 + ... + 8676153.

It is an arithmetic number, because the mean of its divisors is an integer number (5761175220).

Almost surely, 2^199434133965 is an apocalyptic number.

199434133965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199434133965 is a deficient number, since it is larger than the sum of its proper divisors (169281080115).

199434133965 is a wasteful number, since it uses less digits than its factorization.

199434133965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26142.

The product of its digits is 9447840, while the sum is 57.

The spelling of 199434133965 in words is "one hundred ninety-nine billion, four hundred thirty-four million, one hundred thirty-three thousand, nine hundred sixty-five".