61623505 has 16 divisors (see below), whose sum is σ = 76608000. Its totient is φ = 47537280.

The previous prime is 61623493. The next prime is 61623539. The reversal of 61623505 is 50532616.

61623505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61623505 - 2⁵ = 61623473 is a prime.

It is an unprimeable number.

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, 58221 + ... + 59269.

It is an arithmetic number, because the mean of its divisors is an integer number (4788000).

Almost surely, 2^61623505 is an apocalyptic number.

It is an amenable number.

61623505 is a deficient number, since it is larger than the sum of its proper divisors (14984495).

61623505 is a wasteful number, since it uses less digits than its factorization.

61623505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 61623505 is about 7850.0640124779. The cubic root of 61623505 is about 394.9863906009.

It can be divided in two parts, 61623 and 505, that added together give a triangular number (62128 = T₃₅₂).

The spelling of 61623505 in words is "sixty-one million, six hundred twenty-three thousand, five hundred five".