74561455723 has 4 divisors (see below), whose sum is σ = 76576630240. Its totient is φ = 72546281208.

The previous prime is 74561455693. The next prime is 74561455741. The reversal of 74561455723 is 32755416547.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74561455723 - 2²⁹ = 74024584811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74561455753) 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, 1007587203 + ... + 1007587276.

It is an arithmetic number, because the mean of its divisors is an integer number (19144157560).

Almost surely, 2^74561455723 is an apocalyptic number.

74561455723 is a deficient number, since it is larger than the sum of its proper divisors (2015174517).

74561455723 is a wasteful number, since it uses less digits than its factorization.

74561455723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015174516.

The product of its digits is 3528000, while the sum is 49.

The spelling of 74561455723 in words is "seventy-four billion, five hundred sixty-one million, four hundred fifty-five thousand, seven hundred twenty-three".