189856743553 has 8 divisors (see below), whose sum is σ = 200337840800. Its totient is φ = 179424510048.

The previous prime is 189856743547. The next prime is 189856743581. The reversal of 189856743553 is 355347658981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189856743553 - 2¹³ = 189856735361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189856743533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12207951 + ... + 12223492.

It is an arithmetic number, because the mean of its divisors is an integer number (25042230100).

Almost surely, 2^189856743553 is an apocalyptic number.

It is an amenable number.

189856743553 is a deficient number, since it is larger than the sum of its proper divisors (10481097247).

189856743553 is a wasteful number, since it uses less digits than its factorization.

189856743553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24431871.

The product of its digits is 108864000, while the sum is 64.

The spelling of 189856743553 in words is "one hundred eighty-nine billion, eight hundred fifty-six million, seven hundred forty-three thousand, five hundred fifty-three".