61563523 has 16 divisors (see below), whose sum is σ = 72624384. Its totient is φ = 51084000.

The previous prime is 61563521. The next prime is 61563533. The reversal of 61563523 is 32536516.

61563523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61563523 - 2¹ = 61563521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61563521) by changing a digit.

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, 64536 + ... + 65482.

It is an arithmetic number, because the mean of its divisors is an integer number (4539024).

Almost surely, 2^61563523 is an apocalyptic number.

61563523 is a deficient number, since it is larger than the sum of its proper divisors (11060861).

61563523 is a wasteful number, since it uses less digits than its factorization.

61563523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242.

The product of its digits is 16200, while the sum is 31.

The square root of 61563523 is about 7846.2426039474. The cubic root of 61563523 is about 394.8581940368.

The spelling of 61563523 in words is "sixty-one million, five hundred sixty-three thousand, five hundred twenty-three".