61165016550565 has 32 divisors (see below), whose sum is σ = 75386019050496. Its totient is φ = 47613111920640.

The previous prime is 61165016550557. The next prime is 61165016550611. The reversal of 61165016550565 is 56505561056116.

It is not a de Polignac number, because 61165016550565 - 2³ = 61165016550557 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 31 ways as a sum of consecutive naturals, for example, 128986932 + ... + 129460258.

It is an arithmetic number, because the mean of its divisors is an integer number (2355813095328).

Almost surely, 2^{61165016550565} is an apocalyptic number.

It is an amenable number.

61165016550565 is a deficient number, since it is larger than the sum of its proper divisors (14221002499931).

61165016550565 is a wasteful number, since it uses less digits than its factorization.

61165016550565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475029.

The product of its (nonzero) digits is 4050000, while the sum is 52.

The spelling of 61165016550565 in words is "sixty-one trillion, one hundred sixty-five billion, sixteen million, five hundred fifty thousand, five hundred sixty-five".