1868294978612 has 12 divisors (see below), whose sum is σ = 3269526515556. Its totient is φ = 934144545600.

The previous prime is 1868294978611. The next prime is 1868294978621. The reversal of 1868294978612 is 2168794928681.

It can be written as a sum of positive squares in 2 ways, for example, as 1245625637776 + 622669340836 = 1116076^2 + 789094^2 .

It is a super-2 number, since 2×1868294978612² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868294978611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1347362 + ... + 2356262.

It is an arithmetic number, because the mean of its divisors is an integer number (272460542963).

Almost surely, 2^{1868294978612} is an apocalyptic number.

It is an amenable number.

1868294978612 is a deficient number, since it is larger than the sum of its proper divisors (1401231536944).

1868294978612 is a wasteful number, since it uses less digits than its factorization.

1868294978612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471858 (or 1471856 counting only the distinct ones).

The product of its digits is 167215104, while the sum is 71.

The spelling of 1868294978612 in words is "one trillion, eight hundred sixty-eight billion, two hundred ninety-four million, nine hundred seventy-eight thousand, six hundred twelve".