61543375 has 16 divisors (see below), whose sum is σ = 80851680. Its totient is φ = 46641600.

The previous prime is 61543373. The next prime is 61543379. The reversal of 61543375 is 57334516.

It is not a de Polignac number, because 61543375 - 2¹ = 61543373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61543375.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61543373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10582 + ... + 15331.

It is an arithmetic number, because the mean of its divisors is an integer number (5053230).

Almost surely, 2^61543375 is an apocalyptic number.

61543375 is a deficient number, since it is larger than the sum of its proper divisors (19308305).

61543375 is a wasteful number, since it uses less digits than its factorization.

61543375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25947 (or 25937 counting only the distinct ones).

The product of its digits is 37800, while the sum is 34.

The square root of 61543375 is about 7844.9585722297. The cubic root of 61543375 is about 394.8151140302.

The spelling of 61543375 in words is "sixty-one million, five hundred forty-three thousand, three hundred seventy-five".