61838765 has 8 divisors (see below), whose sum is σ = 74941848. Its totient is φ = 48980800.

The previous prime is 61838753. The next prime is 61838767. The reversal of 61838765 is 56783816.

It can be written as a sum of positive squares in 4 ways, for example, as 20016676 + 41822089 = 4474^2 + 6467^2 .

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

It is not a de Polignac number, because 61838765 - 2⁸ = 61838509 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61838767) 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 7 ways as a sum of consecutive naturals, for example, 60722 + ... + 61731.

It is an arithmetic number, because the mean of its divisors is an integer number (9367731).

Almost surely, 2^61838765 is an apocalyptic number.

It is an amenable number.

61838765 is a deficient number, since it is larger than the sum of its proper divisors (13103083).

61838765 is a wasteful number, since it uses less digits than its factorization.

61838765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122559.

The product of its digits is 241920, while the sum is 44.

The square root of 61838765 is about 7863.7627761778. The cubic root of 61838765 is about 395.4457713776.

The spelling of 61838765 in words is "sixty-one million, eight hundred thirty-eight thousand, seven hundred sixty-five".