61220142276 has 12 divisors (see below), whose sum is σ = 142846998672. Its totient is φ = 20406714088.

The previous prime is 61220142271. The next prime is 61220142287. The reversal of 61220142276 is 67224102216.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (61220142271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2550839250 + ... + 2550839273.

It is an arithmetic number, because the mean of its divisors is an integer number (11903916556).

Almost surely, 2^61220142276 is an apocalyptic number.

It is an amenable number.

61220142276 is an abundant number, since it is smaller than the sum of its proper divisors (81626856396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61220142276 is a wasteful number, since it uses less digits than its factorization.

61220142276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5101678530 (or 5101678528 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The spelling of 61220142276 in words is "sixty-one billion, two hundred twenty million, one hundred forty-two thousand, two hundred seventy-six".