72323785461 has 4 divisors (see below), whose sum is σ = 96431713952. Its totient is φ = 48215856972.

The previous prime is 72323785409. The next prime is 72323785463. The reversal of 72323785461 is 16458732327.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16458732327 = 3 ⋅5486244109.

It is not a de Polignac number, because 72323785461 - 2¹⁵ = 72323752693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72323785461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72323785463) 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, 12053964241 + ... + 12053964246.

It is an arithmetic number, because the mean of its divisors is an integer number (24107928488).

Almost surely, 2^72323785461 is an apocalyptic number.

It is an amenable number.

72323785461 is a deficient number, since it is larger than the sum of its proper divisors (24107928491).

72323785461 is a wasteful number, since it uses less digits than its factorization.

72323785461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24107928490.

The product of its digits is 1693440, while the sum is 48.

The spelling of 72323785461 in words is "seventy-two billion, three hundred twenty-three million, seven hundred eighty-five thousand, four hundred sixty-one".