73561265643623 has 2 divisors, whose sum is σ = 73561265643624. Its totient is φ = 73561265643622.

The previous prime is 73561265643611. The next prime is 73561265643647. The reversal of 73561265643623 is 32634656216537.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73561265643623 is a prime.

It is a super-2 number, since 2×73561265643623² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73561265643683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36780632821811 + 36780632821812.

It is an arithmetic number, because the mean of its divisors is an integer number (36780632821812).

Almost surely, 2^{73561265643623} is an apocalyptic number.

73561265643623 is a deficient number, since it is larger than the sum of its proper divisors (1).

73561265643623 is an equidigital number, since it uses as much as digits as its factorization.

73561265643623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97977600, while the sum is 59.

The spelling of 73561265643623 in words is "seventy-three trillion, five hundred sixty-one billion, two hundred sixty-five million, six hundred forty-three thousand, six hundred twenty-three".