205411334001551 has 16 divisors (see below), whose sum is σ = 205745420052480. Its totient is φ = 205077590864640.

The previous prime is 205411334001527. The next prime is 205411334001571. The reversal of 205411334001551 is 155100433114502.

It is a happy number.

205411334001551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 205411334001551 - 2¹⁸ = 205411333739407 is a prime.

It is a super-2 number, since 2×205411334001551² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205411334001571) 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, 9527858510 + ... + 9527880068.

It is an arithmetic number, because the mean of its divisors is an integer number (12859088753280).

Almost surely, 2^{205411334001551} is an apocalyptic number.

205411334001551 is a deficient number, since it is larger than the sum of its proper divisors (334086050929).

205411334001551 is a wasteful number, since it uses less digits than its factorization.

205411334001551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28814.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 205411334001551 in words is "two hundred five trillion, four hundred eleven billion, three hundred thirty-four million, one thousand, five hundred fifty-one".