205618991014 has 16 divisors (see below), whose sum is σ = 310803388848. Its totient is φ = 102019593312.

The previous prime is 205618990961. The next prime is 205618991029. The reversal of 205618991014 is 410199816502.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194824 + ... + 670219.

It is an arithmetic number, because the mean of its divisors is an integer number (19425211803).

Almost surely, 2^205618991014 is an apocalyptic number.

205618991014 is a deficient number, since it is larger than the sum of its proper divisors (105184397834).

205618991014 is a wasteful number, since it uses less digits than its factorization.

205618991014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865959.

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 205618991014 in words is "two hundred five billion, six hundred eighteen million, nine hundred ninety-one thousand, fourteen".