1995137778694 has 8 divisors (see below), whose sum is σ = 2992878016128. Its totient is φ = 997511773320.

The previous prime is 1995137778631. The next prime is 1995137778727. The reversal of 1995137778694 is 4968777315991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1995137778694.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28514337 + ... + 28584220.

It is an arithmetic number, because the mean of its divisors is an integer number (374109752016).

Almost surely, 2^{1995137778694} is an apocalyptic number.

1995137778694 is a deficient number, since it is larger than the sum of its proper divisors (997740237434).

1995137778694 is a wasteful number, since it uses less digits than its factorization.

1995137778694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57116030.

The product of its digits is 720135360, while the sum is 76.

The spelling of 1995137778694 in words is "one trillion, nine hundred ninety-five billion, one hundred thirty-seven million, seven hundred seventy-eight thousand, six hundred ninety-four".