273426401818 has 16 divisors (see below), whose sum is σ = 414942569640. Its totient is φ = 135113654016.

The previous prime is 273426401803. The next prime is 273426401819. The reversal of 273426401818 is 818104624372.

It can be written as a sum of positive squares in 4 ways, for example, as 30108149289 + 243318252529 = 173517^2 + 493273^2 .

It is a super-2 number, since 2×273426401818² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (273426401819) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20980 + ... + 739792.

Almost surely, 2^273426401818 is an apocalyptic number.

273426401818 is a deficient number, since it is larger than the sum of its proper divisors (141516167822).

273426401818 is a wasteful number, since it uses less digits than its factorization.

273426401818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721041.

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 273426401818 in words is "two hundred seventy-three billion, four hundred twenty-six million, four hundred one thousand, eight hundred eighteen".