189025779487 has 8 divisors (see below), whose sum is σ = 194196081296. Its totient is φ = 183858714432.

The previous prime is 189025779479. The next prime is 189025779491. The reversal of 189025779487 is 784977520981.

189025779487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 189025779487 - 2³ = 189025779479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189025779587) 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 7 ways as a sum of consecutive naturals, for example, 690558 + ... + 924619.

It is an arithmetic number, because the mean of its divisors is an integer number (24274510162).

Almost surely, 2^189025779487 is an apocalyptic number.

189025779487 is a deficient number, since it is larger than the sum of its proper divisors (5170301809).

189025779487 is a wasteful number, since it uses less digits than its factorization.

189025779487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618377.

The product of its (nonzero) digits is 71124480, while the sum is 67.

The spelling of 189025779487 in words is "one hundred eighty-nine billion, twenty-five million, seven hundred seventy-nine thousand, four hundred eighty-seven".