189753920187 has 8 divisors (see below), whose sum is σ = 272467167504. Its totient is φ = 116771643168.

The previous prime is 189753920159. The next prime is 189753920233. The reversal of 189753920187 is 781029357981.

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

It is not a de Polignac number, because 189753920187 - 2¹⁶ = 189753854651 is a prime.

It is a super-2 number, since 2×189753920187² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 189753920187.

It is not an unprimeable number, because it can be changed into a prime (189753920887) 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, 2432742528 + ... + 2432742605.

It is an arithmetic number, because the mean of its divisors is an integer number (34058395938).

Almost surely, 2^189753920187 is an apocalyptic number.

189753920187 is a deficient number, since it is larger than the sum of its proper divisors (82713247317).

189753920187 is a wasteful number, since it uses less digits than its factorization.

189753920187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4865485149.

The product of its (nonzero) digits is 7620480, while the sum is 60.

The spelling of 189753920187 in words is "one hundred eighty-nine billion, seven hundred fifty-three million, nine hundred twenty thousand, one hundred eighty-seven".