73780327361 has 4 divisors (see below), whose sum is σ = 79455737172. Its totient is φ = 68104917552.

The previous prime is 73780327303. The next prime is 73780327393. The reversal of 73780327361 is 16372308737.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16372308737 = 1361 ⋅12029617.

It can be written as a sum of positive squares in 2 ways, for example, as 9489682225 + 64290645136 = 97415^2 + 253556^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73780327361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73780327561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2837704886 + ... + 2837704911.

It is an arithmetic number, because the mean of its divisors is an integer number (19863934293).

Almost surely, 2^73780327361 is an apocalyptic number.

It is an amenable number.

73780327361 is a deficient number, since it is larger than the sum of its proper divisors (5675409811).

73780327361 is a wasteful number, since it uses less digits than its factorization.

73780327361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5675409810.

The product of its (nonzero) digits is 889056, while the sum is 47.

The spelling of 73780327361 in words is "seventy-three billion, seven hundred eighty million, three hundred twenty-seven thousand, three hundred sixty-one".