612753381 has 12 divisors (see below), whose sum is σ = 885443052. Its totient is φ = 408338496.

The previous prime is 612753353. The next prime is 612753413. The reversal of 612753381 is 183357216.

612753381 is a `hidden beast` number, since 6 + 1 + 275 + 3 + 381 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 113230881 + 499522500 = 10641^2 + 22350^2 .

It is not a de Polignac number, because 612753381 - 2¹⁸ = 612491237 is a prime.

It is a super-2 number, since 2×612753381² = 750933411853862322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612753481) 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, 12735 + ... + 37251.

It is an arithmetic number, because the mean of its divisors is an integer number (73786921).

Almost surely, 2^612753381 is an apocalyptic number.

It is an amenable number.

612753381 is a deficient number, since it is larger than the sum of its proper divisors (272689671).

612753381 is a wasteful number, since it uses less digits than its factorization.

612753381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27300 (or 27297 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 612753381 is about 24753.8558814581. The cubic root of 612753381 is about 849.3667167624.

The spelling of 612753381 in words is "six hundred twelve million, seven hundred fifty-three thousand, three hundred eighty-one".