61036540 has 36 divisors (see below), whose sum is σ = 130032504. Its totient is φ = 24066016.

The previous prime is 61036529. The next prime is 61036543. The reversal of 61036540 is 4563016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61036543) 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 11 ways as a sum of consecutive naturals, for example, 137559 + ... + 138001.

It is an arithmetic number, because the mean of its divisors is an integer number (3612014).

Almost surely, 2^61036540 is an apocalyptic number.

It is an amenable number.

61036540 is an abundant number, since it is smaller than the sum of its proper divisors (68995964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61036540 is a wasteful number, since it uses less digits than its factorization.

61036540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 61036540 is about 7812.5885594981. The cubic root of 61036540 is about 393.7283034992.

Adding to 61036540 its reverse (4563016), we get a palindrome (65599556).

The spelling of 61036540 in words is "sixty-one million, thirty-six thousand, five hundred forty".