1955274818 has 16 divisors (see below), whose sum is σ = 3354100800. Its totient is φ = 837424656.

The previous prime is 1955274803. The next prime is 1955274847. The reversal of 1955274818 is 8184725591.

It is a super-2 number, since 2×1955274818² = 7646199227809866248, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23396 + ... + 66767.

It is an arithmetic number, because the mean of its divisors is an integer number (209631300).

Almost surely, 2^1955274818 is an apocalyptic number.

1955274818 is a deficient number, since it is larger than the sum of its proper divisors (1398825982).

1955274818 is a wasteful number, since it uses less digits than its factorization.

1955274818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91721.

The product of its digits is 806400, while the sum is 50.

The square root of 1955274818 is about 44218.4895490563. The cubic root of 1955274818 is about 1250.4584596712.

The spelling of 1955274818 in words is "one billion, nine hundred fifty-five million, two hundred seventy-four thousand, eight hundred eighteen".