612734561 has 6 divisors (see below), whose sum is σ = 633138786. Its totient is φ = 592968000.

The previous prime is 612734557. The next prime is 612734567. The reversal of 612734561 is 165437216.

It can be written as a sum of positive squares in only one way, i.e., 439153936 + 173580625 = 20956^2 + 13175^2 .

It is not a de Polignac number, because 612734561 - 2² = 612734557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612734567) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 317840 + ... + 319761.

It is an arithmetic number, because the mean of its divisors is an integer number (105523131).

Almost surely, 2^612734561 is an apocalyptic number.

It is an amenable number.

612734561 is a deficient number, since it is larger than the sum of its proper divisors (20404225).

612734561 is an equidigital number, since it uses as much as digits as its factorization.

612734561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637663 (or 637632 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 612734561 is about 24753.4757357426. The cubic root of 612734561 is about 849.3580209065.

The spelling of 612734561 in words is "six hundred twelve million, seven hundred thirty-four thousand, five hundred sixty-one".