61805365 has 4 divisors (see below), whose sum is σ = 74166444. Its totient is φ = 49444288.

The previous prime is 61805363. The next prime is 61805371. The reversal of 61805365 is 56350816.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35354916 + 26450449 = 5946^2 + 5143^2 .

It is a cyclic number.

It is not a de Polignac number, because 61805365 - 2¹ = 61805363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61805365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61805363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6180532 + ... + 6180541.

It is an arithmetic number, because the mean of its divisors is an integer number (18541611).

Almost surely, 2^61805365 is an apocalyptic number.

It is an amenable number.

61805365 is a deficient number, since it is larger than the sum of its proper divisors (12361079).

61805365 is a wasteful number, since it uses less digits than its factorization.

61805365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12361078.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 61805365 is about 7861.6388240621. The cubic root of 61805365 is about 395.3745632532.

The spelling of 61805365 in words is "sixty-one million, eight hundred five thousand, three hundred sixty-five".