189626861543616 has 168 divisors, whose sum is σ = 644185079399680. Its totient is φ = 54179103267072.

The previous prime is 189626861543591. The next prime is 189626861543617. The reversal of 189626861543616 is 616345168626981.

It is a happy number.

189626861543616 is a `hidden beast` number, since 1 + 8 + 9 + 6 + 2 + 6 + 8 + 61 + 543 + 6 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (189626861543617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 870825796 + ... + 871043523.

Almost surely, 2^{189626861543616} is an apocalyptic number.

189626861543616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

189626861543616 is an abundant number, since it is smaller than the sum of its proper divisors (454558217856064).

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

189626861543616 is an equidigital number, since it uses as much as digits as its factorization.

189626861543616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741869353 (or 1741869331 counting only the distinct ones).

The product of its digits is 537477120, while the sum is 72.

The spelling of 189626861543616 in words is "one hundred eighty-nine trillion, six hundred twenty-six billion, eight hundred sixty-one million, five hundred forty-three thousand, six hundred sixteen".