75561540 has 48 divisors (see below), whose sum is σ = 214135488. Its totient is φ = 19905664.

The previous prime is 75561533. The next prime is 75561557. The reversal of 75561540 is 4516557.

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, 2607 + ... + 12566.

It is an arithmetic number, because the mean of its divisors is an integer number (4461156).

Almost surely, 2^75561540 is an apocalyptic number.

It is an amenable number.

75561540 is an abundant number, since it is smaller than the sum of its proper divisors (138573948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75561540 is a wasteful number, since it uses less digits than its factorization.

75561540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15268 (or 15266 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 75561540 is about 8692.6141062398. The cubic root of 75561540 is about 422.7662082932.

The spelling of 75561540 in words is "seventy-five million, five hundred sixty-one thousand, five hundred forty".