1953729516918 has 64 divisors (see below), whose sum is σ = 4075488172800. Its totient is φ = 623613943680.

The previous prime is 1953729516899. The next prime is 1953729516979. The reversal of 1953729516918 is 8196159273591.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39477273 + ... + 39526731.

It is an arithmetic number, because the mean of its divisors is an integer number (63679502700).

Almost surely, 2^{1953729516918} is an apocalyptic number.

1953729516918 is an abundant number, since it is smaller than the sum of its proper divisors (2121758655882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1953729516918 is a wasteful number, since it uses less digits than its factorization.

1953729516918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51357.

The product of its digits is 36741600, while the sum is 66.

The spelling of 1953729516918 in words is "one trillion, nine hundred fifty-three billion, seven hundred twenty-nine million, five hundred sixteen thousand, nine hundred eighteen".