1951818198336 has 84 divisors (see below), whose sum is σ = 5597534074912. Its totient is φ = 650257231104.

The previous prime is 1951818198329. The next prime is 1951818198353. The reversal of 1951818198336 is 6338918181591.

1951818198336 is a `hidden beast` number, since 1 + 9 + 518 + 1 + 8 + 1 + 9 + 83 + 36 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167901 + ... + 1982883.

Almost surely, 2^{1951818198336} is an apocalyptic number.

1951818198336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1951818198336 is an abundant number, since it is smaller than the sum of its proper divisors (3645715876576).

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

1951818198336 is a wasteful number, since it uses less digits than its factorization.

1951818198336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816868 (or 1816855 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 63.

The spelling of 1951818198336 in words is "one trillion, nine hundred fifty-one billion, eight hundred eighteen million, one hundred ninety-eight thousand, three hundred thirty-six".