612156849 has 4 divisors (see below), whose sum is σ = 816209136. Its totient is φ = 408104564.

The previous prime is 612156847. The next prime is 612156851. The reversal of 612156849 is 948651216.

612156849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (612156847) and next prime (612156851).

It is a cyclic number.

It is not a de Polignac number, because 612156849 - 2¹ = 612156847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 612156849.

It is not an unprimeable number, because it can be changed into a prime (612156847) 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, 102026139 + ... + 102026144.

It is an arithmetic number, because the mean of its divisors is an integer number (204052284).

Almost surely, 2^612156849 is an apocalyptic number.

It is an amenable number.

612156849 is a deficient number, since it is larger than the sum of its proper divisors (204052287).

612156849 is a wasteful number, since it uses less digits than its factorization.

612156849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204052286.

The product of its digits is 103680, while the sum is 42.

The square root of 612156849 is about 24741.8036731359. The cubic root of 612156849 is about 849.0910001084.

The spelling of 612156849 in words is "six hundred twelve million, one hundred fifty-six thousand, eight hundred forty-nine".