205544351451 has 16 divisors (see below), whose sum is σ = 290628808704. Its totient is φ = 128769650304.

The previous prime is 205544351449. The next prime is 205544351503. The reversal of 205544351451 is 154153445502.

It is not a de Polignac number, because 205544351451 - 2¹ = 205544351449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205544351401) 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, 3081595 + ... + 3147588.

It is an arithmetic number, because the mean of its divisors is an integer number (18164300544).

Almost surely, 2^205544351451 is an apocalyptic number.

205544351451 is a deficient number, since it is larger than the sum of its proper divisors (85084457253).

205544351451 is a wasteful number, since it uses less digits than its factorization.

205544351451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6229850.

The product of its (nonzero) digits is 240000, while the sum is 39.

Adding to 205544351451 its reverse (154153445502), we get a palindrome (359697796953).

The spelling of 205544351451 in words is "two hundred five billion, five hundred forty-four million, three hundred fifty-one thousand, four hundred fifty-one".