61500505 has 32 divisors (see below), whose sum is σ = 85494528. Its totient is φ = 42028800.

The previous prime is 61500463. The next prime is 61500521. The reversal of 61500505 is 50500516.

It is not a de Polignac number, because 61500505 - 2⁷ = 61500377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76767 + ... + 77563.

It is an arithmetic number, because the mean of its divisors is an integer number (2671704).

Almost surely, 2^61500505 is an apocalyptic number.

It is an amenable number.

61500505 is a deficient number, since it is larger than the sum of its proper divisors (23994023).

61500505 is a wasteful number, since it uses less digits than its factorization.

61500505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 61500505 is about 7842.2257682370. The cubic root of 61500505 is about 394.7234190508.

The spelling of 61500505 in words is "sixty-one million, five hundred thousand, five hundred five".