45640072447 has 4 divisors (see below), whose sum is σ = 45644669800. Its totient is φ = 45635475096.

The previous prime is 45640072441. The next prime is 45640072483. The reversal of 45640072447 is 74427004654.

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 45640072447 - 2⁷ = 45640072319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45640072441) 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, 2283753 + ... + 2303650.

It is an arithmetic number, because the mean of its divisors is an integer number (11411167450).

Almost surely, 2^45640072447 is an apocalyptic number.

45640072447 is a deficient number, since it is larger than the sum of its proper divisors (4597353).

45640072447 is an equidigital number, since it uses as much as digits as its factorization.

45640072447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4597352.

The product of its (nonzero) digits is 752640, while the sum is 43.

The spelling of 45640072447 in words is "forty-five billion, six hundred forty million, seventy-two thousand, four hundred forty-seven".