73561265643613 has 16 divisors (see below), whose sum is σ = 82882330223616. Its totient is φ = 64708216478640.

The previous prime is 73561265643611. The next prime is 73561265643623. The reversal of 73561265643613 is 31634656216537.

It is a cyclic number.

It is not a de Polignac number, because 73561265643613 - 2¹ = 73561265643611 is a prime.

It is a super-2 number, since 2×73561265643613² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73561265643611) 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, 726681381 + ... + 726782602.

It is an arithmetic number, because the mean of its divisors is an integer number (5180145638976).

Almost surely, 2^{73561265643613} is an apocalyptic number.

It is an amenable number.

73561265643613 is a deficient number, since it is larger than the sum of its proper divisors (9321064580003).

73561265643613 is a wasteful number, since it uses less digits than its factorization.

73561265643613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453464144.

The product of its digits is 48988800, while the sum is 58.

The spelling of 73561265643613 in words is "seventy-three trillion, five hundred sixty-one billion, two hundred sixty-five million, six hundred forty-three thousand, six hundred thirteen".