61216571441 has 16 divisors (see below), whose sum is σ = 63553678848. Its totient is φ = 58902681600.

The previous prime is 61216571419. The next prime is 61216571443. The reversal of 61216571441 is 14417561216.

It is a cyclic number.

It is not a de Polignac number, because 61216571441 - 2³⁴ = 44036702257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61216571395 and 61216571404.

It is not an unprimeable number, because it can be changed into a prime (61216571443) 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 15 ways as a sum of consecutive naturals, for example, 7537715 + ... + 7545831.

It is an arithmetic number, because the mean of its divisors is an integer number (3972104928).

Almost surely, 2^61216571441 is an apocalyptic number.

It is an amenable number.

61216571441 is a deficient number, since it is larger than the sum of its proper divisors (2337107407).

61216571441 is a wasteful number, since it uses less digits than its factorization.

61216571441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9512.

The product of its digits is 40320, while the sum is 38.

The spelling of 61216571441 in words is "sixty-one billion, two hundred sixteen million, five hundred seventy-one thousand, four hundred forty-one".