213398040861 has 16 divisors (see below), whose sum is σ = 334742025600. Its totient is φ = 133896809664.

The previous prime is 213398040841. The next prime is 213398040871. The reversal of 213398040861 is 168040893312.

213398040861 is a `hidden beast` number, since 213 + 398 + 0 + 40 + 8 + 6 + 1 = 666.

It is not a de Polignac number, because 213398040861 - 2⁶ = 213398040797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213398040811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232459281 + ... + 232460198.

It is an arithmetic number, because the mean of its divisors is an integer number (20921376600).

Almost surely, 2^213398040861 is an apocalyptic number.

It is an amenable number.

213398040861 is a deficient number, since it is larger than the sum of its proper divisors (121343984739).

213398040861 is a wasteful number, since it uses less digits than its factorization.

213398040861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464919505 (or 464919499 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 213398040861 in words is "two hundred thirteen billion, three hundred ninety-eight million, forty thousand, eight hundred sixty-one".