73680510891 has 16 divisors (see below), whose sum is σ = 107246943776. Its totient is φ = 44720729856.

The previous prime is 73680510889. The next prime is 73680510931. The reversal of 73680510891 is 19801508637.

It is not a de Polignac number, because 73680510891 - 2¹ = 73680510889 is a prime.

It is a super-2 number, since 2×73680510891² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73680510891.

It is not an unprimeable number, because it can be changed into a prime (73680510851) 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, 12937180 + ... + 12942873.

It is an arithmetic number, because the mean of its divisors is an integer number (6702933986).

Almost surely, 2^73680510891 is an apocalyptic number.

73680510891 is a deficient number, since it is larger than the sum of its proper divisors (33566432885).

73680510891 is a wasteful number, since it uses less digits than its factorization.

73680510891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25880142.

The product of its (nonzero) digits is 362880, while the sum is 48.

The spelling of 73680510891 in words is "seventy-three billion, six hundred eighty million, five hundred ten thousand, eight hundred ninety-one".