73558072121 has 4 divisors (see below), whose sum is σ = 73564381044. Its totient is φ = 73551763200.

The previous prime is 73558072087. The next prime is 73558072129. The reversal of 73558072121 is 12127085537.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59358013225 + 14200058896 = 243635^2 + 119164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73558072121 is a prime.

It is a super-3 number, since 3×73558072121³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73558072129) 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, 3136940 + ... + 3160301.

It is an arithmetic number, because the mean of its divisors is an integer number (18391095261).

Almost surely, 2^73558072121 is an apocalyptic number.

It is an amenable number.

73558072121 is a deficient number, since it is larger than the sum of its proper divisors (6308923).

73558072121 is a wasteful number, since it uses less digits than its factorization.

73558072121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308922.

The product of its (nonzero) digits is 117600, while the sum is 41.

The spelling of 73558072121 in words is "seventy-three billion, five hundred fifty-eight million, seventy-two thousand, one hundred twenty-one".