61271582489 has 16 divisors (see below), whose sum is σ = 71072971200. Its totient is φ = 52335533376.

The previous prime is 61271582479. The next prime is 61271582501. The reversal of 61271582489 is 98428517216.

It is a cyclic number.

It is not a de Polignac number, because 61271582489 - 2²⁸ = 61003147033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61271582489.

It is not an unprimeable number, because it can be changed into a prime (61271582479) 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, 2873834 + ... + 2895075.

It is an arithmetic number, because the mean of its divisors is an integer number (4442060700).

Almost surely, 2^61271582489 is an apocalyptic number.

It is an amenable number.

61271582489 is a deficient number, since it is larger than the sum of its proper divisors (9801388711).

61271582489 is a wasteful number, since it uses less digits than its factorization.

61271582489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5768984.

The product of its digits is 1935360, while the sum is 53.

The spelling of 61271582489 in words is "sixty-one billion, two hundred seventy-one million, five hundred eighty-two thousand, four hundred eighty-nine".