205156442102 has 16 divisors (see below), whose sum is σ = 329062813632. Its totient is φ = 95588323200.

The previous prime is 205156442053. The next prime is 205156442173. The reversal of 205156442102 is 201244651502.

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, 29867918 + ... + 29874785.

It is an arithmetic number, because the mean of its divisors is an integer number (20566425852).

Almost surely, 2^205156442102 is an apocalyptic number.

205156442102 is a deficient number, since it is larger than the sum of its proper divisors (123906371530).

205156442102 is a wasteful number, since it uses less digits than its factorization.

205156442102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59742823.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 205156442102 in words is "two hundred five billion, one hundred fifty-six million, four hundred forty-two thousand, one hundred two".