73356577621 has 4 divisors (see below), whose sum is σ = 73420201132. Its totient is φ = 73292954112.

The previous prime is 73356577607. The next prime is 73356577643. The reversal of 73356577621 is 12677565337.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12677565337 = 37 ⋅342636901.

It can be written as a sum of positive squares in 2 ways, for example, as 66790716721 + 6565860900 = 258439^2 + 81030^2 .

It is a cyclic number.

It is not a de Polignac number, because 73356577621 - 2¹¹ = 73356575573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73350577621) 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, 31810026 + ... + 31812331.

It is an arithmetic number, because the mean of its divisors is an integer number (18355050283).

Almost surely, 2^73356577621 is an apocalyptic number.

It is an amenable number.

73356577621 is a deficient number, since it is larger than the sum of its proper divisors (63623511).

73356577621 is a wasteful number, since it uses less digits than its factorization.

73356577621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63623510.

The product of its digits is 5556600, while the sum is 52.

The spelling of 73356577621 in words is "seventy-three billion, three hundred fifty-six million, five hundred seventy-seven thousand, six hundred twenty-one".