75399645 has 16 divisors (see below), whose sum is σ = 121185792. Its totient is φ = 40031040.

The previous prime is 75399637. The next prime is 75399671. The reversal of 75399645 is 54699357.

It is not a de Polignac number, because 75399645 - 2³ = 75399637 is a prime.

It is a super-2 number, since 2×75399645² = 11370212932252050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 75399594 and 75399603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7926 + ... + 14615.

It is an arithmetic number, because the mean of its divisors is an integer number (7574112).

Almost surely, 2^75399645 is an apocalyptic number.

It is an amenable number.

75399645 is a deficient number, since it is larger than the sum of its proper divisors (45786147).

75399645 is a wasteful number, since it uses less digits than its factorization.

75399645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22772.

The product of its digits is 1020600, while the sum is 48.

The square root of 75399645 is about 8683.2968969165. The cubic root of 75399645 is about 422.4640586585.

The spelling of 75399645 in words is "seventy-five million, three hundred ninety-nine thousand, six hundred forty-five".