612000891081 has 12 divisors (see below), whose sum is σ = 898984360560. Its totient is φ = 401085329400.

The previous prime is 612000891079. The next prime is 612000891083. The reversal of 612000891081 is 180198000216.

It is an interprime number because it is at equal distance from previous prime (612000891079) and next prime (612000891083).

It is not a de Polignac number, because 612000891081 - 2¹ = 612000891079 is a prime.

It is a super-2 number, since 2×612000891081² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (612000891083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 576271495 + ... + 576272556.

It is an arithmetic number, because the mean of its divisors is an integer number (74915363380).

Almost surely, 2^612000891081 is an apocalyptic number.

It is an amenable number.

612000891081 is a deficient number, since it is larger than the sum of its proper divisors (286983469479).

612000891081 is a wasteful number, since it uses less digits than its factorization.

612000891081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152544116 (or 1152544113 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

Adding to 612000891081 its reverse (180198000216), we get a palindrome (792198891297).

The spelling of 612000891081 in words is "six hundred twelve billion, eight hundred ninety-one thousand, eighty-one".