45778521 has 4 divisors (see below), whose sum is σ = 61038032. Its totient is φ = 30519012.

The previous prime is 45778511. The next prime is 45778529. The reversal of 45778521 is 12587754.

45778521 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 not a de Polignac number, because 45778521 - 2⁵ = 45778489 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 45778521.

It is not an unprimeable number, because it can be changed into a prime (45778529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7629751 + ... + 7629756.

It is an arithmetic number, because the mean of its divisors is an integer number (15259508).

Almost surely, 2^45778521 is an apocalyptic number.

It is an amenable number.

45778521 is a deficient number, since it is larger than the sum of its proper divisors (15259511).

45778521 is a wasteful number, since it uses less digits than its factorization.

45778521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15259510.

The product of its digits is 78400, while the sum is 39.

The square root of 45778521 is about 6765.9826337347. The cubic root of 45778521 is about 357.7288110918.

The spelling of 45778521 in words is "forty-five million, seven hundred seventy-eight thousand, five hundred twenty-one".