189866457630 has 48 divisors (see below), whose sum is σ = 494158292784. Its totient is φ = 50579208960.

The previous prime is 189866457611. The next prime is 189866457637. The reversal of 189866457630 is 36754668981.

189866457630 is a `hidden beast` number, since 1 + 8 + 98 + 66 + 457 + 6 + 30 = 666.

189866457630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189866457637) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 991716 + ... + 1167575.

It is an arithmetic number, because the mean of its divisors is an integer number (10294964433).

Almost surely, 2^189866457630 is an apocalyptic number.

189866457630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189866457630 is an abundant number, since it is smaller than the sum of its proper divisors (304291835154).

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

189866457630 is a wasteful number, since it uses less digits than its factorization.

189866457630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160281 (or 2160278 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 189866457630 in words is "one hundred eighty-nine billion, eight hundred sixty-six million, four hundred fifty-seven thousand, six hundred thirty".