73355921081 has 4 divisors (see below), whose sum is σ = 73724544000. Its totient is φ = 72987298164.

The previous prime is 73355921071. The next prime is 73355921101. The reversal of 73355921081 is 18012955337.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18012955337 = 13 ⋅1385611949.

It is a cyclic number.

It is not a de Polignac number, because 73355921081 - 2⁶ = 73355921017 is a prime.

It is a super-2 number, since 2×73355921081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73355921011) 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, 184311161 + ... + 184311558.

It is an arithmetic number, because the mean of its divisors is an integer number (18431136000).

Almost surely, 2^73355921081 is an apocalyptic number.

It is an amenable number.

73355921081 is a deficient number, since it is larger than the sum of its proper divisors (368622919).

73355921081 is a wasteful number, since it uses less digits than its factorization.

73355921081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368622918.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 73355921081 in words is "seventy-three billion, three hundred fifty-five million, nine hundred twenty-one thousand, eighty-one".