613612556321 has 16 divisors (see below), whose sum is σ = 633435487680. Its totient is φ = 594106824960.

The previous prime is 613612556317. The next prime is 613612556327. The reversal of 613612556321 is 123655216316.

It is a cyclic number.

It is not a de Polignac number, because 613612556321 - 2² = 613612556317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613612556327) 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, 33674405 + ... + 33692621.

It is an arithmetic number, because the mean of its divisors is an integer number (39589717980).

Almost surely, 2^613612556321 is an apocalyptic number.

It is an amenable number.

613612556321 is a deficient number, since it is larger than the sum of its proper divisors (19822931359).

613612556321 is a wasteful number, since it uses less digits than its factorization.

613612556321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26864.

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

The spelling of 613612556321 in words is "six hundred thirteen billion, six hundred twelve million, five hundred fifty-six thousand, three hundred twenty-one".