61363765 has 8 divisors (see below), whose sum is σ = 73689048. Its totient is φ = 49056000.

The previous prime is 61363741. The next prime is 61363769. The reversal of 61363765 is 56736316.

61363765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 39204 + 61324561 = 198^2 + 7831^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61363765 - 2⁷ = 61363637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61363769) 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 7 ways as a sum of consecutive naturals, for example, 5265 + ... + 12265.

It is an arithmetic number, because the mean of its divisors is an integer number (9211131).

Almost surely, 2^61363765 is an apocalyptic number.

It is an amenable number.

61363765 is a deficient number, since it is larger than the sum of its proper divisors (12325283).

61363765 is a wasteful number, since it uses less digits than its factorization.

61363765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8759.

The product of its digits is 68040, while the sum is 37.

The square root of 61363765 is about 7833.5027286649. The cubic root of 61363765 is about 394.4306597635.

It can be divided in two parts, 61363 and 765, that added together give a triangular number (62128 = T₃₅₂).

The spelling of 61363765 in words is "sixty-one million, three hundred sixty-three thousand, seven hundred sixty-five".