61511065 has 16 divisors (see below), whose sum is σ = 92027520. Its totient is φ = 38344320.

The previous prime is 61511033. The next prime is 61511071. The reversal of 61511065 is 56011516.

It is not a de Polignac number, because 61511065 - 2⁵ = 61511033 is a prime.

It is a super-2 number, since 2×61511065² = 7567222234868450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79500 + ... + 80269.

It is an arithmetic number, because the mean of its divisors is an integer number (5751720).

Almost surely, 2^61511065 is an apocalyptic number.

It is an amenable number.

61511065 is a deficient number, since it is larger than the sum of its proper divisors (30516455).

61511065 is a wasteful number, since it uses less digits than its factorization.

61511065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159792.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 61511065 is about 7842.8990175827. The cubic root of 61511065 is about 394.7460098721.

The spelling of 61511065 in words is "sixty-one million, five hundred eleven thousand, sixty-five".