72340557193 has 4 divisors (see below), whose sum is σ = 76147954960. Its totient is φ = 68533159428.

The previous prime is 72340557127. The next prime is 72340557197. The reversal of 72340557193 is 39175504327.

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 72340557193 - 2²⁹ = 71803686281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72340557197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1903698855 + ... + 1903698892.

It is an arithmetic number, because the mean of its divisors is an integer number (19036988740).

Almost surely, 2^72340557193 is an apocalyptic number.

It is an amenable number.

72340557193 is a deficient number, since it is larger than the sum of its proper divisors (3807397767).

72340557193 is a wasteful number, since it uses less digits than its factorization.

72340557193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3807397766.

The product of its (nonzero) digits is 793800, while the sum is 46.

The spelling of 72340557193 in words is "seventy-two billion, three hundred forty million, five hundred fifty-seven thousand, one hundred ninety-three".