745808505 has 32 divisors (see below), whose sum is σ = 1287221376. Its totient is φ = 366557184.

The previous prime is 745808489. The next prime is 745808521. The reversal of 745808505 is 505808547.

It is an interprime number because it is at equal distance from previous prime (745808489) and next prime (745808521).

It is not a de Polignac number, because 745808505 - 2⁴ = 745808489 is a prime.

It is a super-2 number, since 2×745808505² = 1112460652260670050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128394 + ... + 134076.

It is an arithmetic number, because the mean of its divisors is an integer number (40225668).

Almost surely, 2^745808505 is an apocalyptic number.

It is an amenable number.

745808505 is a deficient number, since it is larger than the sum of its proper divisors (541412871).

745808505 is a wasteful number, since it uses less digits than its factorization.

745808505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6377.

The product of its (nonzero) digits is 224000, while the sum is 42.

The square root of 745808505 is about 27309.4947774579. The cubic root of 745808505 is about 906.8645887086.

Adding to 745808505 its sum of digits (42), we get a palindrome (745808547).

The spelling of 745808505 in words is "seven hundred forty-five million, eight hundred eight thousand, five hundred five".