1868781562272 has 192 divisors, whose sum is σ = 5527586937600. Its totient is φ = 621834153984.

The previous prime is 1868781562259. The next prime is 1868781562309. The reversal of 1868781562272 is 2722651878681.

1868781562272 is a `hidden beast` number, since 1 + 8 + 68 + 7 + 8 + 1 + 562 + 2 + 7 + 2 = 666.

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 31 ways as a sum of consecutive naturals, for example, 40357629 + ... + 40403907.

It is an arithmetic number, because the mean of its divisors is an integer number (28789515300).

Almost surely, 2^{1868781562272} is an apocalyptic number.

1868781562272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1868781562272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2763793468800).

1868781562272 is an abundant number, since it is smaller than the sum of its proper divisors (3658805375328).

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

1868781562272 is an frugal number, since it uses more digits than its factorization.

1868781562272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46887 (or 46861 counting only the distinct ones).

The product of its digits is 36126720, while the sum is 63.

The spelling of 1868781562272 in words is "one trillion, eight hundred sixty-eight billion, seven hundred eighty-one million, five hundred sixty-two thousand, two hundred seventy-two".