612355600661 has 16 divisors (see below), whose sum is σ = 705540059136. Its totient is φ = 520599695616.

The previous prime is 612355600651. The next prime is 612355600667. The reversal of 612355600661 is 166006553216.

612355600661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 612355600661 - 2²⁶ = 612288491797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612355600667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3193475 + ... + 3379791.

It is an arithmetic number, because the mean of its divisors is an integer number (44096253696).

Almost surely, 2^612355600661 is an apocalyptic number.

It is an amenable number.

612355600661 is a deficient number, since it is larger than the sum of its proper divisors (93184458475).

612355600661 is a wasteful number, since it uses less digits than its factorization.

612355600661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190148.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 612355600661 in words is "six hundred twelve billion, three hundred fifty-five million, six hundred thousand, six hundred sixty-one".