61516565 has 8 divisors (see below), whose sum is σ = 80530848. Its totient is φ = 44739280.

The previous prime is 61516549. The next prime is 61516571. The reversal of 61516565 is 56561516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61516565 - 2⁴ = 61516549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559187 + ... + 559296.

It is an arithmetic number, because the mean of its divisors is an integer number (10066356).

Almost surely, 2^61516565 is an apocalyptic number.

It is an amenable number.

61516565 is a deficient number, since it is larger than the sum of its proper divisors (19014283).

61516565 is a wasteful number, since it uses less digits than its factorization.

61516565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118499.

The product of its digits is 27000, while the sum is 35.

The square root of 61516565 is about 7843.2496453957. The cubic root of 61516565 is about 394.7577749008.

The spelling of 61516565 in words is "sixty-one million, five hundred sixteen thousand, five hundred sixty-five".