61384765 has 16 divisors (see below), whose sum is σ = 79556400. Its totient is φ = 45199872.

The previous prime is 61384733. The next prime is 61384777. The reversal of 61384765 is 56748316.

It is a happy number.

61384765 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 8 ways, for example, as 1570009 + 59814756 = 1253^2 + 7734^2 .

It is a cyclic number.

It is not a de Polignac number, because 61384765 - 2⁵ = 61384733 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 25431 + ... + 27739.

It is an arithmetic number, because the mean of its divisors is an integer number (4972275).

Almost surely, 2^61384765 is an apocalyptic number.

61384765 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61384765 is a deficient number, since it is larger than the sum of its proper divisors (18171635).

61384765 is a wasteful number, since it uses less digits than its factorization.

61384765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736.

The product of its digits is 120960, while the sum is 40.

The square root of 61384765 is about 7834.8430105523. The cubic root of 61384765 is about 394.4756488498.

The spelling of 61384765 in words is "sixty-one million, three hundred eighty-four thousand, seven hundred sixty-five".