73156065137 has 4 divisors (see below), whose sum is σ = 73165501440. Its totient is φ = 73146628836.

The previous prime is 73156065131. The next prime is 73156065209.

73156065137 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73156065137 - 2¹⁶ = 73155999601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73156065131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4706513 + ... + 4722030.

It is an arithmetic number, because the mean of its divisors is an integer number (18291375360).

Almost surely, 2^73156065137 is an apocalyptic number.

It is an amenable number.

73156065137 is a deficient number, since it is larger than the sum of its proper divisors (9436303).

73156065137 is an equidigital number, since it uses as much as digits as its factorization.

73156065137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9436302.

The product of its (nonzero) digits is 396900, while the sum is 44.

It can be divided in two parts, 731560 and 65137, that added together give a palindrome (796697).

The spelling of 73156065137 in words is "seventy-three billion, one hundred fifty-six million, sixty-five thousand, one hundred thirty-seven".