189870288465 has 256 divisors, whose sum is σ = 377683181568. Its totient is φ = 80196480000.

The previous prime is 189870288431. The next prime is 189870288473. The reversal of 189870288465 is 564882078981.

It is not a de Polignac number, because 189870288465 - 2¹³ = 189870280273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189870288396 and 189870288405.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 618469842 + ... + 618470148.

It is an arithmetic number, because the mean of its divisors is an integer number (1475324928).

Almost surely, 2^189870288465 is an apocalyptic number.

189870288465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189870288465 is a deficient number, since it is larger than the sum of its proper divisors (187812893103).

189870288465 is a wasteful number, since it uses less digits than its factorization.

189870288465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572.

The product of its (nonzero) digits is 61931520, while the sum is 66.

The spelling of 189870288465 in words is "one hundred eighty-nine billion, eight hundred seventy million, two hundred eighty-eight thousand, four hundred sixty-five".