73156065136 has 80 divisors (see below), whose sum is σ = 176905248768. Its totient is φ = 28471622400.

The previous prime is 73156065131. The next prime is 73156065209. The reversal of 73156065136 is 63156065137.

It is a junction number, because it is equal to n+sod(n) for n = 73156065092 and 73156065101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73156065131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1127761 + ... + 1190863.

Almost surely, 2^73156065136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73156065136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88452624384).

73156065136 is an abundant number, since it is smaller than the sum of its proper divisors (103749183632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73156065136 is a wasteful number, since it uses less digits than its factorization.

73156065136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64070 (or 64064 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 43.

Subtracting from 73156065136 its reverse (63156065137), we obtain a palindrome (9999999999).

The spelling of 73156065136 in words is "seventy-three billion, one hundred fifty-six million, sixty-five thousand, one hundred thirty-six".