61606501565 has 8 divisors (see below), whose sum is σ = 84488916480. Its totient is φ = 42244458192.

The previous prime is 61606501483. The next prime is 61606501591. The reversal of 61606501565 is 56510560616.

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

It is a cyclic number.

It is not a de Polignac number, because 61606501565 - 2⁸ = 61606501309 is a prime.

It is a super-2 number, since 2×61606501565² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 880092845 + ... + 880092914.

It is an arithmetic number, because the mean of its divisors is an integer number (10561114560).

Almost surely, 2^61606501565 is an apocalyptic number.

It is an amenable number.

61606501565 is a deficient number, since it is larger than the sum of its proper divisors (22882414915).

61606501565 is a wasteful number, since it uses less digits than its factorization.

61606501565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760185771.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 61606501565 in words is "sixty-one billion, six hundred six million, five hundred one thousand, five hundred sixty-five".