213855190065 has 96 divisors (see below), whose sum is σ = 422929019520. Its totient is φ = 102437470080.

The previous prime is 213855190001. The next prime is 213855190079. The reversal of 213855190065 is 560091558312.

213855190065 is a `hidden beast` number, since 2 + 1 + 3 + 8 + 551 + 90 + 0 + 6 + 5 = 666.

It is not a de Polignac number, because 213855190065 - 2⁶ = 213855190001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 213855190065.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1276939 + ... + 1434671.

It is an arithmetic number, because the mean of its divisors is an integer number (4405510620).

Almost surely, 2^213855190065 is an apocalyptic number.

It is an amenable number.

213855190065 is a deficient number, since it is larger than the sum of its proper divisors (209073829455).

213855190065 is a wasteful number, since it uses less digits than its factorization.

213855190065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157852 (or 157835 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The spelling of 213855190065 in words is "two hundred thirteen billion, eight hundred fifty-five million, one hundred ninety thousand, sixty-five".