61520603 has 16 divisors (see below), whose sum is σ = 68356224. Its totient is φ = 55111680.

The previous prime is 61520597. The next prime is 61520611. The reversal of 61520603 is 30602516.

It is a cyclic number.

It is not a de Polignac number, because 61520603 - 2¹⁶ = 61455067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61520663) 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 15 ways as a sum of consecutive naturals, for example, 28523 + ... + 30603.

It is an arithmetic number, because the mean of its divisors is an integer number (4272264).

Almost surely, 2^61520603 is an apocalyptic number.

61520603 is a deficient number, since it is larger than the sum of its proper divisors (6835621).

61520603 is a wasteful number, since it uses less digits than its factorization.

61520603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 61520603 is about 7843.5070599828. The cubic root of 61520603 is about 394.7664121246.

The spelling of 61520603 in words is "sixty-one million, five hundred twenty thousand, six hundred three".