612330564978 has 64 divisors (see below), whose sum is σ = 1486844519040. Its totient is φ = 185253868800.

The previous prime is 612330564977. The next prime is 612330564991. The reversal of 612330564978 is 879465033216.

612330564978 is a `hidden beast` number, since 6 + 1 + 2 + 3 + 3 + 0 + 564 + 9 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (612330564977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 468883 + ... + 1201878.

It is an arithmetic number, because the mean of its divisors is an integer number (23231945610).

It is a 1-persistent number, because it is pandigital, but 2⋅612330564978 = 1224661129956 is not.

Almost surely, 2^612330564978 is an apocalyptic number.

612330564978 is an abundant number, since it is smaller than the sum of its proper divisors (874513954062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

612330564978 is a wasteful number, since it uses less digits than its factorization.

612330564978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671400 (or 1671394 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 612330564978 in words is "six hundred twelve billion, three hundred thirty million, five hundred sixty-four thousand, nine hundred seventy-eight".