745137878 has 4 divisors (see below), whose sum is σ = 1117706820. Its totient is φ = 372568938.

The previous prime is 745137851. The next prime is 745137889. The reversal of 745137878 is 878731547.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186284468 + ... + 186284471.

It is an arithmetic number, because the mean of its divisors is an integer number (279426705).

Almost surely, 2^745137878 is an apocalyptic number.

745137878 is a deficient number, since it is larger than the sum of its proper divisors (372568942).

745137878 is a wasteful number, since it uses less digits than its factorization.

745137878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372568941.

The product of its digits is 1317120, while the sum is 50.

The square root of 745137878 is about 27297.2137406000. The cubic root of 745137878 is about 906.5926912744.

The spelling of 745137878 in words is "seven hundred forty-five million, one hundred thirty-seven thousand, eight hundred seventy-eight".