61550161565 has 8 divisors (see below), whose sum is σ = 73868075520. Its totient is φ = 49234874832.

The previous prime is 61550161549. The next prime is 61550161577. The reversal of 61550161565 is 56516105516.

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 61550161565 - 2⁴ = 61550161549 is a prime.

It is a Curzon 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, 604889 + ... + 699278.

It is an arithmetic number, because the mean of its divisors is an integer number (9233509440).

Almost surely, 2^61550161565 is an apocalyptic number.

It is an amenable number.

61550161565 is a deficient number, since it is larger than the sum of its proper divisors (12317913955).

61550161565 is a wasteful number, since it uses less digits than its factorization.

61550161565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313611.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 61550161565 in words is "sixty-one billion, five hundred fifty million, one hundred sixty-one thousand, five hundred sixty-five".