612550656 has 144 divisors (see below), whose sum is σ = 1788696000. Its totient is φ = 201940992.

The previous prime is 612550637. The next prime is 612550661. The reversal of 612550656 is 656055216.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 612550656.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3078045 + ... + 3078243.

It is an arithmetic number, because the mean of its divisors is an integer number (12421500).

Almost surely, 2^612550656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612550656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894348000).

612550656 is an abundant number, since it is smaller than the sum of its proper divisors (1176145344).

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

612550656 is a wasteful number, since it uses less digits than its factorization.

612550656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 612550656 is about 24749.7607261161. The cubic root of 612550656 is about 849.2730374968.

The spelling of 612550656 in words is "six hundred twelve million, five hundred fifty thousand, six hundred fifty-six".