745488578 has 4 divisors (see below), whose sum is σ = 1118232870. Its totient is φ = 372744288.

The previous prime is 745488517. The next prime is 745488593. The reversal of 745488578 is 875884547.

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

It can be written as a sum of positive squares in only one way, i.e., 744580369 + 908209 = 27287^2 + 953^2 .

It is a Curzon number.

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, 186372143 + ... + 186372146.

Almost surely, 2^745488578 is an apocalyptic number.

745488578 is a deficient number, since it is larger than the sum of its proper divisors (372744292).

745488578 is a wasteful number, since it uses less digits than its factorization.

745488578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372744291.

The product of its digits is 10035200, while the sum is 56.

The square root of 745488578 is about 27303.6367174778. The cubic root of 745488578 is about 906.7348985980.

The spelling of 745488578 in words is "seven hundred forty-five million, four hundred eighty-eight thousand, five hundred seventy-eight".