73185497641 has 4 divisors (see below), whose sum is σ = 77490526932. Its totient is φ = 68880468352.

The previous prime is 73185497639. The next prime is 73185497711. The reversal of 73185497641 is 14679458137.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40228726041 + 32956771600 = 200571^2 + 181540^2 .

It is not a de Polignac number, because 73185497641 - 2¹ = 73185497639 is a prime.

It is a super-2 number, since 2×73185497641² (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 (73185497141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2152514620 + ... + 2152514653.

It is an arithmetic number, because the mean of its divisors is an integer number (19372631733).

Almost surely, 2^73185497641 is an apocalyptic number.

It is an amenable number.

73185497641 is a deficient number, since it is larger than the sum of its proper divisors (4305029291).

73185497641 is a wasteful number, since it uses less digits than its factorization.

73185497641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4305029290.

The product of its digits is 5080320, while the sum is 55.

The spelling of 73185497641 in words is "seventy-three billion, one hundred eighty-five million, four hundred ninety-seven thousand, six hundred forty-one".