45919778 has 4 divisors (see below), whose sum is σ = 68879670. Its totient is φ = 22959888.

The previous prime is 45919739. The next prime is 45919781. The reversal of 45919778 is 87791954.

45919778 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 an emirpimes, since its reverse is a distinct semiprime: 87791954 = 2 ⋅43895977.

It can be written as a sum of positive squares in only one way, i.e., 35724529 + 10195249 = 5977^2 + 3193^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 11479943 + ... + 11479946.

Almost surely, 2^45919778 is an apocalyptic number.

45919778 is a deficient number, since it is larger than the sum of its proper divisors (22959892).

45919778 is a wasteful number, since it uses less digits than its factorization.

45919778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22959891.

The product of its digits is 635040, while the sum is 50.

The square root of 45919778 is about 6776.4133581121. The cubic root of 45919778 is about 358.0963765782.

The spelling of 45919778 in words is "forty-five million, nine hundred nineteen thousand, seven hundred seventy-eight".