75561147 has 16 divisors (see below), whose sum is σ = 112092960. Its totient is φ = 50306400.

The previous prime is 75561139. The next prime is 75561149. The reversal of 75561147 is 74116557.

It is not a de Polignac number, because 75561147 - 2³ = 75561139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75561149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26197 + ... + 28937.

It is an arithmetic number, because the mean of its divisors is an integer number (7005810).

Almost surely, 2^75561147 is an apocalyptic number.

75561147 is a deficient number, since it is larger than the sum of its proper divisors (36531813).

75561147 is a wasteful number, since it uses less digits than its factorization.

75561147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3771 (or 3765 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 75561147 is about 8692.5915008126. The cubic root of 75561147 is about 422.7654753479.

The spelling of 75561147 in words is "seventy-five million, five hundred sixty-one thousand, one hundred forty-seven".