73501680001 has 4 divisors (see below), whose sum is σ = 73504152900. Its totient is φ = 73499207104.

The previous prime is 73501679963. The next prime is 73501680053. The reversal of 73501680001 is 10008610537.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10008610537 = 641 ⋅15614057.

It can be written as a sum of positive squares in 2 ways, for example, as 33653535601 + 39848144400 = 183449^2 + 199620^2 .

It is a cyclic number.

It is not a de Polignac number, because 73501680001 - 2¹⁷ = 73501548929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73501680401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1191316 + ... + 1251493.

It is an arithmetic number, because the mean of its divisors is an integer number (18376038225).

Almost surely, 2^73501680001 is an apocalyptic number.

It is an amenable number.

73501680001 is a deficient number, since it is larger than the sum of its proper divisors (2472899).

73501680001 is a wasteful number, since it uses less digits than its factorization.

73501680001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472898.

The product of its (nonzero) digits is 5040, while the sum is 31.

The spelling of 73501680001 in words is "seventy-three billion, five hundred one million, six hundred eighty thousand, one".