61276644089 has 16 divisors (see below), whose sum is σ = 65580713280. Its totient is φ = 57081101760.

The previous prime is 61276644073. The next prime is 61276644113. The reversal of 61276644089 is 98044667216.

It is a cyclic number.

It is not a de Polignac number, because 61276644089 - 2⁴ = 61276644073 is a prime.

It is a super-2 number, since 2×61276644089² (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 61276644089.

It is not an unprimeable number, because it can be changed into a prime (61276644029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4540019 + ... + 4553495.

It is an arithmetic number, because the mean of its divisors is an integer number (4098794580).

Almost surely, 2^61276644089 is an apocalyptic number.

It is an amenable number.

61276644089 is a deficient number, since it is larger than the sum of its proper divisors (4304069191).

61276644089 is a wasteful number, since it uses less digits than its factorization.

61276644089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17480.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 61276644089 in words is "sixty-one billion, two hundred seventy-six million, six hundred forty-four thousand, eighty-nine".