75556945 has 4 divisors (see below), whose sum is σ = 90668340. Its totient is φ = 60445552.

The previous prime is 75556937. The next prime is 75556967. The reversal of 75556945 is 54965557.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9492561 + 66064384 = 3081^2 + 8128^2 .

It is a cyclic number.

It is not a de Polignac number, because 75556945 - 2³ = 75556937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75556895 and 75556904.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7555690 + ... + 7555699.

It is an arithmetic number, because the mean of its divisors is an integer number (22667085).

Almost surely, 2^75556945 is an apocalyptic number.

It is an amenable number.

75556945 is a deficient number, since it is larger than the sum of its proper divisors (15111395).

75556945 is a wasteful number, since it uses less digits than its factorization.

75556945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15111394.

The product of its digits is 945000, while the sum is 46.

The square root of 75556945 is about 8692.3497973793. The cubic root of 75556945 is about 422.7576384568.

The spelling of 75556945 in words is "seventy-five million, five hundred fifty-six thousand, nine hundred forty-five".