61725775 has 24 divisors (see below), whose sum is σ = 83365200. Its totient is φ = 45158400.

The previous prime is 61725773. The next prime is 61725779. The reversal of 61725775 is 57752716.

It is not a de Polignac number, because 61725775 - 2¹ = 61725773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61725773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11535 + ... + 16015.

It is an arithmetic number, because the mean of its divisors is an integer number (3473550).

Almost surely, 2^61725775 is an apocalyptic number.

61725775 is a deficient number, since it is larger than the sum of its proper divisors (21639425).

61725775 is a wasteful number, since it uses less digits than its factorization.

61725775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539 (or 4534 counting only the distinct ones).

The product of its digits is 102900, while the sum is 40.

The square root of 61725775 is about 7856.5752717071. The cubic root of 61725775 is about 395.2047755184.

It can be divided in two parts, 61725 and 775, that added together give a square (62500 = 250²).

The spelling of 61725775 in words is "sixty-one million, seven hundred twenty-five thousand, seven hundred seventy-five".