189981028694 has 16 divisors (see below), whose sum is σ = 292411088640. Its totient is φ = 92522973480.

The previous prime is 189981028681. The next prime is 189981028697. The reversal of 189981028694 is 496820189981.

It is a self number, because there is not a number n which added to its sum of digits gives 189981028694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189981028697) 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, 3045842 + ... + 3107589.

It is an arithmetic number, because the mean of its divisors is an integer number (18275693040).

Almost surely, 2^189981028694 is an apocalyptic number.

189981028694 is a deficient number, since it is larger than the sum of its proper divisors (102430059946).

189981028694 is a wasteful number, since it uses less digits than its factorization.

189981028694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6153835.

The product of its (nonzero) digits is 17915904, while the sum is 65.

The spelling of 189981028694 in words is "one hundred eighty-nine billion, nine hundred eighty-one million, twenty-eight thousand, six hundred ninety-four".