612155659 has 4 divisors (see below), whose sum is σ = 612221320. Its totient is φ = 612090000.

The previous prime is 612155657. The next prime is 612155689. The reversal of 612155659 is 956551216.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 612155659 - 2¹ = 612155657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612155653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15954 + ... + 38455.

It is an arithmetic number, because the mean of its divisors is an integer number (153055330).

Almost surely, 2^612155659 is an apocalyptic number.

612155659 is a deficient number, since it is larger than the sum of its proper divisors (65661).

612155659 is a wasteful number, since it uses less digits than its factorization.

612155659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65660.

The product of its digits is 81000, while the sum is 40.

The square root of 612155659 is about 24741.7796247562. The cubic root of 612155659 is about 849.0904499123.

The spelling of 612155659 in words is "six hundred twelve million, one hundred fifty-five thousand, six hundred fifty-nine".