45394578649 has 4 divisors (see below), whose sum is σ = 51879518464. Its totient is φ = 38909638836.

The previous prime is 45394578643. The next prime is 45394578667. The reversal of 45394578649 is 94687549354.

45394578649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 45394578649 - 2⁵ = 45394578617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45394578643) 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, 3242469897 + ... + 3242469910.

It is an arithmetic number, because the mean of its divisors is an integer number (12969879616).

Almost surely, 2^45394578649 is an apocalyptic number.

It is an amenable number.

45394578649 is a deficient number, since it is larger than the sum of its proper divisors (6484939815).

45394578649 is an equidigital number, since it uses as much as digits as its factorization.

45394578649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6484939814.

The product of its digits is 130636800, while the sum is 64.

The spelling of 45394578649 in words is "forty-five billion, three hundred ninety-four million, five hundred seventy-eight thousand, six hundred forty-nine".