189896396257 has 8 divisors (see below), whose sum is σ = 194498849600. Its totient is φ = 185345948304.

The previous prime is 189896396201. The next prime is 189896396273. The reversal of 189896396257 is 752693698981.

189896396257 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 189896396257 - 2¹⁹ = 189895871969 is a prime.

It is a super-2 number, since 2×189896396257² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189896396257.

It is not an unprimeable number, because it can be changed into a prime (189896394257) 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, 12993957 + ... + 13008562.

It is an arithmetic number, because the mean of its divisors is an integer number (24312356200).

Almost surely, 2^189896396257 is an apocalyptic number.

It is an amenable number.

189896396257 is a deficient number, since it is larger than the sum of its proper divisors (4602453343).

189896396257 is a wasteful number, since it uses less digits than its factorization.

189896396257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26002695.

The product of its digits is 352719360, while the sum is 73.

The spelling of 189896396257 in words is "one hundred eighty-nine billion, eight hundred ninety-six million, three hundred ninety-six thousand, two hundred fifty-seven".