45537878 has 4 divisors (see below), whose sum is σ = 68306820. Its totient is φ = 22768938.

The previous prime is 45537871. The next prime is 45537881. The reversal of 45537878 is 87873554.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87873554 = 2 ⋅43936777.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45537871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11384468 + ... + 11384471.

It is an arithmetic number, because the mean of its divisors is an integer number (17076705).

Almost surely, 2^45537878 is an apocalyptic number.

45537878 is a deficient number, since it is larger than the sum of its proper divisors (22768942).

45537878 is a wasteful number, since it uses less digits than its factorization.

45537878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22768941.

The product of its digits is 940800, while the sum is 47.

The square root of 45537878 is about 6748.1759016789. The cubic root of 45537878 is about 357.1008876701.

The spelling of 45537878 in words is "forty-five million, five hundred thirty-seven thousand, eight hundred seventy-eight".