61220755127 has 4 divisors (see below), whose sum is σ = 69966577296. Its totient is φ = 52474932960.

The previous prime is 61220755091. The next prime is 61220755151. The reversal of 61220755127 is 72155702216.

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 61220755127 - 2²⁸ = 60952319671 is a prime.

It is a super-2 number, since 2×61220755127² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61220755177) 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, 4372911074 + ... + 4372911087.

It is an arithmetic number, because the mean of its divisors is an integer number (17491644324).

Almost surely, 2^61220755127 is an apocalyptic number.

61220755127 is a deficient number, since it is larger than the sum of its proper divisors (8745822169).

61220755127 is an equidigital number, since it uses as much as digits as its factorization.

61220755127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8745822168.

The product of its (nonzero) digits is 58800, while the sum is 38.

The spelling of 61220755127 in words is "sixty-one billion, two hundred twenty million, seven hundred fifty-five thousand, one hundred twenty-seven".