73971482513 has 4 divisors (see below), whose sum is σ = 73972300260. Its totient is φ = 73970664768.

The previous prime is 73971482489. The next prime is 73971482527. The reversal of 73971482513 is 31528417937.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 70909298944 + 3062183569 = 266288^2 + 55337^2 .

It is a cyclic number.

It is not a de Polignac number, because 73971482513 - 2²⁰ = 73970433937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73971482113) 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, 253508 + ... + 460661.

It is an arithmetic number, because the mean of its divisors is an integer number (18493075065).

Almost surely, 2^73971482513 is an apocalyptic number.

It is an amenable number.

73971482513 is a deficient number, since it is larger than the sum of its proper divisors (817747).

73971482513 is a wasteful number, since it uses less digits than its factorization.

73971482513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817746.

The product of its digits is 1270080, while the sum is 50.

The spelling of 73971482513 in words is "seventy-three billion, nine hundred seventy-one million, four hundred eighty-two thousand, five hundred thirteen".