75478945 has 8 divisors (see below), whose sum is σ = 92502144. Its totient is φ = 59098224.

The previous prime is 75478937. The next prime is 75478951. The reversal of 75478945 is 54987457.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75478945 - 2³ = 75478937 is a prime.

It is a super-2 number, since 2×75478945² = 11394142276626050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 160359 + ... + 160828.

It is an arithmetic number, because the mean of its divisors is an integer number (11562768).

Almost surely, 2^75478945 is an apocalyptic number.

It is an amenable number.

75478945 is a deficient number, since it is larger than the sum of its proper divisors (17023199).

75478945 is a wasteful number, since it uses less digits than its factorization.

75478945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321239.

The product of its digits is 1411200, while the sum is 49.

The square root of 75478945 is about 8687.8619349067. The cubic root of 75478945 is about 422.6121126796.

The spelling of 75478945 in words is "seventy-five million, four hundred seventy-eight thousand, nine hundred forty-five".