1641694794 has 64 divisors (see below), whose sum is σ = 3527193600. Its totient is φ = 507592448.

The previous prime is 1641694787. The next prime is 1641694841. The reversal of 1641694794 is 4974961461.

It is a Harshad number since it is a multiple of its sum of digits (51).

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, 3917917 + ... + 3918335.

It is an arithmetic number, because the mean of its divisors is an integer number (55112400).

Almost surely, 2^1641694794 is an apocalyptic number.

1641694794 is an abundant number, since it is smaller than the sum of its proper divisors (1885498806).

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

1641694794 is a wasteful number, since it uses less digits than its factorization.

1641694794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907.

The product of its digits is 1306368, while the sum is 51.

The square root of 1641694794 is about 40517.8330368247. The cubic root of 1641694794 is about 1179.6797929397.

The spelling of 1641694794 in words is "one billion, six hundred forty-one million, six hundred ninety-four thousand, seven hundred ninety-four".