214561685394 has 72 divisors (see below), whose sum is σ = 542735926668. Its totient is φ = 61081957440.

The previous prime is 214561685389. The next prime is 214561685441. The reversal of 214561685394 is 493586165412.

214561685394 is a `hidden beast` number, since 2 + 1 + 45 + 6 + 1 + 68 + 539 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 206763912369 + 7797773025 = 454713^2 + 88305^2 .

It is a super-2 number, since 2×214561685394² (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 214561685394.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 194797 + ... + 683424.

Almost surely, 2^214561685394 is an apocalyptic number.

214561685394 is an abundant number, since it is smaller than the sum of its proper divisors (328174241274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

214561685394 is a wasteful number, since it uses less digits than its factorization.

214561685394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878520 (or 878510 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 214561685394 in words is "two hundred fourteen billion, five hundred sixty-one million, six hundred eighty-five thousand, three hundred ninety-four".