61216770127 has 4 divisors (see below), whose sum is σ = 61479503280. Its totient is φ = 60954036976.

The previous prime is 61216770119. The next prime is 61216770133. The reversal of 61216770127 is 72107761216.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61216770127 - 2³ = 61216770119 is a prime.

It is a super-2 number, since 2×61216770127² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61216770127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61216770107) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 131366227 + ... + 131366692.

It is an arithmetic number, because the mean of its divisors is an integer number (15369875820).

Almost surely, 2^61216770127 is an apocalyptic number.

61216770127 is a deficient number, since it is larger than the sum of its proper divisors (262733153).

61216770127 is a wasteful number, since it uses less digits than its factorization.

61216770127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262733152.

The product of its (nonzero) digits is 49392, while the sum is 40.

The spelling of 61216770127 in words is "sixty-one billion, two hundred sixteen million, seven hundred seventy thousand, one hundred twenty-seven".