1143420861864 has 64 divisors (see below), whose sum is σ = 2940424058880. Its totient is φ = 370301184000.

The previous prime is 1143420861839. The next prime is 1143420861893. The reversal of 1143420861864 is 4681680243411.

It is a super-2 number, since 2×1143420861864² (a number of 25 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 2173672 + ... + 2647959.

It is an arithmetic number, because the mean of its divisors is an integer number (45944125920).

Almost surely, 2^{1143420861864} is an apocalyptic number.

It is an amenable number.

1143420861864 is an abundant number, since it is smaller than the sum of its proper divisors (1797003197016).

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

1143420861864 is a wasteful number, since it uses less digits than its factorization.

1143420861864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4821922 (or 4821918 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 48.

The spelling of 1143420861864 in words is "one trillion, one hundred forty-three billion, four hundred twenty million, eight hundred sixty-one thousand, eight hundred sixty-four".