73726581810 has 128 divisors (see below), whose sum is σ = 209419499520. Its totient is φ = 16261410816.

The previous prime is 73726581791. The next prime is 73726581827. The reversal of 73726581810 is 1818562737.

It is a happy number.

It is a super-2 number, since 2×73726581810² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73726581810.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 700306 + ... + 798674.

It is an arithmetic number, because the mean of its divisors is an integer number (1636089840).

Almost surely, 2^73726581810 is an apocalyptic number.

73726581810 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 73726581810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104709749760).

73726581810 is an abundant number, since it is smaller than the sum of its proper divisors (135692917710).

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

73726581810 is a wasteful number, since it uses less digits than its factorization.

73726581810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98512.

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 73726581810 in words is "seventy-three billion, seven hundred twenty-six million, five hundred eighty-one thousand, eight hundred ten".