61221410759 has 4 divisors (see below), whose sum is σ = 61222655304. Its totient is φ = 61220166216.

The previous prime is 61221410749. The next prime is 61221410773. The reversal of 61221410759 is 95701412216.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61221410759 - 2³² = 56926443463 is a prime.

It is a super-2 number, since 2×61221410759² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61221410749) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 545312 + ... + 647925.

It is an arithmetic number, because the mean of its divisors is an integer number (15305663826).

Almost surely, 2^61221410759 is an apocalyptic number.

61221410759 is a deficient number, since it is larger than the sum of its proper divisors (1244545).

61221410759 is a wasteful number, since it uses less digits than its factorization.

61221410759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244544.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 61221410759 in words is "sixty-one billion, two hundred twenty-one million, four hundred ten thousand, seven hundred fifty-nine".