745506515 has 24 divisors (see below), whose sum is σ = 1016831088. Its totient is φ = 521536320.

The previous prime is 745506511. The next prime is 745506571. The reversal of 745506515 is 515605547.

It is not a de Polignac number, because 745506515 - 2² = 745506511 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (745506511) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 7580 + ... + 39350.

It is an arithmetic number, because the mean of its divisors is an integer number (42367962).

Almost surely, 2^745506515 is an apocalyptic number.

745506515 is a deficient number, since it is larger than the sum of its proper divisors (271324573).

745506515 is a wasteful number, since it uses less digits than its factorization.

745506515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31827 (or 31808 counting only the distinct ones).

The product of its (nonzero) digits is 105000, while the sum is 38.

The square root of 745506515 is about 27303.9651882286. The cubic root of 745506515 is about 906.7421707744.

The spelling of 745506515 in words is "seven hundred forty-five million, five hundred six thousand, five hundred fifteen".