61761825 has 24 divisors (see below), whose sum is σ = 113460000. Its totient is φ = 32939280.

The previous prime is 61761823. The next prime is 61761881. The reversal of 61761825 is 52816716.

61761825 is a `hidden beast` number, since 6 + 17 + 618 + 25 = 666.

61761825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61761825 - 2¹ = 61761823 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61761825.

It is not an unprimeable number, because it can be changed into a prime (61761823) 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 23 ways as a sum of consecutive naturals, for example, 45075 + ... + 46424.

It is an arithmetic number, because the mean of its divisors is an integer number (4727500).

Almost surely, 2^61761825 is an apocalyptic number.

It is an amenable number.

61761825 is a deficient number, since it is larger than the sum of its proper divisors (51698175).

61761825 is a wasteful number, since it uses less digits than its factorization.

61761825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91518 (or 91507 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 61761825 is about 7858.8691934654. The cubic root of 61761825 is about 395.2816983245.

It can be divided in two parts, 6176 and 1825, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 61761825 in words is "sixty-one million, seven hundred sixty-one thousand, eight hundred twenty-five".