61724575 has 24 divisors (see below), whose sum is σ = 83856240. Its totient is φ = 44697600.

The previous prime is 61724573. The next prime is 61724587. The reversal of 61724575 is 57542716.

It is not a de Polignac number, because 61724575 - 2¹ = 61724573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61724573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106687 + ... + 107263.

It is an arithmetic number, because the mean of its divisors is an integer number (3494010).

Almost surely, 2^61724575 is an apocalyptic number.

61724575 is a deficient number, since it is larger than the sum of its proper divisors (22131665).

61724575 is a wasteful number, since it uses less digits than its factorization.

61724575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987 (or 982 counting only the distinct ones).

The product of its digits is 58800, while the sum is 37.

The square root of 61724575 is about 7856.4989021828. The cubic root of 61724575 is about 395.2022144662.

The spelling of 61724575 in words is "sixty-one million, seven hundred twenty-four thousand, five hundred seventy-five".