1994079999164 has 24 divisors (see below), whose sum is σ = 3806925692976. Its totient is φ = 906389120000.

The previous prime is 1994079999137. The next prime is 1994079999169. The reversal of 1994079999164 is 4619999704991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994079999169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4298204 + ... + 4739484.

It is an arithmetic number, because the mean of its divisors is an integer number (158621903874).

Almost surely, 2^{1994079999164} is an apocalyptic number.

It is an amenable number.

1994079999164 is a deficient number, since it is larger than the sum of its proper divisors (1812845693812).

1994079999164 is a wasteful number, since it uses less digits than its factorization.

1994079999164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543997 (or 543995 counting only the distinct ones).

The product of its (nonzero) digits is 357128352, while the sum is 77.

The spelling of 1994079999164 in words is "one trillion, nine hundred ninety-four billion, seventy-nine million, nine hundred ninety-nine thousand, one hundred sixty-four".