612261109989 has 32 divisors (see below), whose sum is σ = 926190819840. Its totient is φ = 399643911936.

The previous prime is 612261109973. The next prime is 612261110023. The reversal of 612261109989 is 989901162216.

612261109989 is a `hidden beast` number, since 6 + 12 + 2 + 611 + 0 + 9 + 9 + 8 + 9 = 666.

It is not a de Polignac number, because 612261109989 - 2⁴ = 612261109973 is a prime.

It is a super-3 number, since 3×612261109989³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612261109939) by changing a digit.

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, 863677 + ... + 1403730.

It is an arithmetic number, because the mean of its divisors is an integer number (28943463120).

Almost surely, 2^612261109989 is an apocalyptic number.

It is an amenable number.

612261109989 is a deficient number, since it is larger than the sum of its proper divisors (313929709851).

612261109989 is a wasteful number, since it uses less digits than its factorization.

612261109989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267626 (or 2267620 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

It can be divided in two parts, 61226 and 1109989, that added together give a triangular number (1171215 = T₁₅₃₀).

The spelling of 612261109989 in words is "six hundred twelve billion, two hundred sixty-one million, one hundred nine thousand, nine hundred eighty-nine".