205155451311 has 8 divisors (see below), whose sum is σ = 273639973680. Its totient is φ = 136720614912.

The previous prime is 205155451307. The next prime is 205155451321. The reversal of 205155451311 is 113154551502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205155451311 - 2² = 205155451307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205155451321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12411856 + ... + 12428373.

It is an arithmetic number, because the mean of its divisors is an integer number (34204996710).

Almost surely, 2^205155451311 is an apocalyptic number.

205155451311 is a deficient number, since it is larger than the sum of its proper divisors (68484522369).

205155451311 is a wasteful number, since it uses less digits than its factorization.

205155451311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24842985.

The product of its (nonzero) digits is 15000, while the sum is 33.

The spelling of 205155451311 in words is "two hundred five billion, one hundred fifty-five million, four hundred fifty-one thousand, three hundred eleven".