61281716465 has 8 divisors (see below), whose sum is σ = 76735366848. Its totient is φ = 46893835120.

The previous prime is 61281716407. The next prime is 61281716477. The reversal of 61281716465 is 56461718216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61281716465 - 2⁶ = 61281716401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 266442131 + ... + 266442360.

It is an arithmetic number, because the mean of its divisors is an integer number (9591920856).

Almost surely, 2^61281716465 is an apocalyptic number.

It is an amenable number.

61281716465 is a deficient number, since it is larger than the sum of its proper divisors (15453650383).

61281716465 is a wasteful number, since it uses less digits than its factorization.

61281716465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532884519.

The product of its digits is 483840, while the sum is 47.

The spelling of 61281716465 in words is "sixty-one billion, two hundred eighty-one million, seven hundred sixteen thousand, four hundred sixty-five".