1630189694 has 16 divisors (see below), whose sum is σ = 2795129856. Its totient is φ = 698523000.

The previous prime is 1630189679. The next prime is 1630189733. The reversal of 1630189694 is 4969810361.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136379 + ... + 147849.

It is an arithmetic number, because the mean of its divisors is an integer number (174695616).

Almost surely, 2^1630189694 is an apocalyptic number.

1630189694 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1630189694 is a deficient number, since it is larger than the sum of its proper divisors (1164940162).

1630189694 is a wasteful number, since it uses less digits than its factorization.

1630189694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21631.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 1630189694 is about 40375.6076610619. The cubic root of 1630189694 is about 1176.9175736138.

The spelling of 1630189694 in words is "one billion, six hundred thirty million, one hundred eighty-nine thousand, six hundred ninety-four".