745512778 has 16 divisors (see below), whose sum is σ = 1172934144. Its totient is φ = 354963600.

The previous prime is 745512721. The next prime is 745512793. The reversal of 745512778 is 877215547.

It is a super-2 number, since 2×745512778² = 1111578604322554568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103698 + ... + 110653.

It is an arithmetic number, because the mean of its divisors is an integer number (73308384).

Almost surely, 2^745512778 is an apocalyptic number.

745512778 is a deficient number, since it is larger than the sum of its proper divisors (427421366).

745512778 is a wasteful number, since it uses less digits than its factorization.

745512778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214437.

The product of its digits is 548800, while the sum is 46.

The square root of 745512778 is about 27304.0798782893. The cubic root of 745512778 is about 906.7447099475.

The spelling of 745512778 in words is "seven hundred forty-five million, five hundred twelve thousand, seven hundred seventy-eight".