73818501121 has 4 divisors (see below), whose sum is σ = 73819732144. Its totient is φ = 73817270100.

The previous prime is 73818501089. The next prime is 73818501167. The reversal of 73818501121 is 12110581837.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 73818501121 - 2⁵ = 73818501089 is a prime.

It is a super-2 number, since 2×73818501121² (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 (73818501221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520695 + ... + 647116.

It is an arithmetic number, because the mean of its divisors is an integer number (18454933036).

Almost surely, 2^73818501121 is an apocalyptic number.

It is an amenable number.

73818501121 is a deficient number, since it is larger than the sum of its proper divisors (1231023).

73818501121 is a wasteful number, since it uses less digits than its factorization.

73818501121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231022.

The product of its (nonzero) digits is 13440, while the sum is 37.

The spelling of 73818501121 in words is "seventy-three billion, eight hundred eighteen million, five hundred one thousand, one hundred twenty-one".