61731461659 has 16 divisors (see below), whose sum is σ = 70937303040. Its totient is φ = 52622760960.

The previous prime is 61731461647. The next prime is 61731461683. The reversal of 61731461659 is 95616413716.

It is a happy number.

It is not a de Polignac number, because 61731461659 - 2²⁹ = 61194590747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61731461609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2066262 + ... + 2095924.

It is an arithmetic number, because the mean of its divisors is an integer number (4433581440).

Almost surely, 2^61731461659 is an apocalyptic number.

61731461659 is a deficient number, since it is larger than the sum of its proper divisors (9205841381).

61731461659 is a wasteful number, since it uses less digits than its factorization.

61731461659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31290.

The product of its digits is 816480, while the sum is 49.

The spelling of 61731461659 in words is "sixty-one billion, seven hundred thirty-one million, four hundred sixty-one thousand, six hundred fifty-nine".