190739947644 has 18 divisors (see below), whose sum is σ = 482148201080. Its totient is φ = 63579982536.

The previous prime is 190739947613. The next prime is 190739947667. The reversal of 190739947644 is 446749937091.

190739947644 is a `hidden beast` number, since 1 + 9 + 0 + 73 + 99 + 476 + 4 + 4 = 666.

190739947644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×190739947644² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2649165904 + ... + 2649165975.

Almost surely, 2^190739947644 is an apocalyptic number.

It is an amenable number.

190739947644 is an abundant number, since it is smaller than the sum of its proper divisors (291408253436).

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

190739947644 is a wasteful number, since it uses less digits than its factorization.

190739947644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5298331889 (or 5298331884 counting only the distinct ones).

The product of its (nonzero) digits is 41150592, while the sum is 63.

The spelling of 190739947644 in words is "one hundred ninety billion, seven hundred thirty-nine million, nine hundred forty-seven thousand, six hundred forty-four".