73189236861 has 24 divisors (see below), whose sum is σ = 114220826720. Its totient is φ = 44892799776.

The previous prime is 73189236847. The next prime is 73189236863. The reversal of 73189236861 is 16863298137.

It is not a de Polignac number, because 73189236861 - 2¹³ = 73189228669 is a prime.

It is a super-2 number, since 2×73189236861² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 73189236798 and 73189236807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73189236863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 982891 + ... + 1054728.

Almost surely, 2^73189236861 is an apocalyptic number.

It is an amenable number.

73189236861 is a deficient number, since it is larger than the sum of its proper divisors (41031589859).

73189236861 is a wasteful number, since it uses less digits than its factorization.

73189236861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2037945 (or 2037942 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The spelling of 73189236861 in words is "seventy-three billion, one hundred eighty-nine million, two hundred thirty-six thousand, eight hundred sixty-one".