61500501065605 has 24 divisors (see below), whose sum is σ = 85895810615160. Its totient is φ = 42149111034240.

The previous prime is 61500501065593. The next prime is 61500501065611. The reversal of 61500501065605 is 50656010500516.

It can be written as a sum of positive squares in 4 ways, for example, as 5325820835076 + 56174680230529 = 2307774^2 + 7494977^2 .

It is not a de Polignac number, because 61500501065605 - 2⁷ = 61500501065477 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66986950 + ... + 67898839.

It is an arithmetic number, because the mean of its divisors is an integer number (3578992108965).

Almost surely, 2^{61500501065605} is an apocalyptic number.

It is an amenable number.

61500501065605 is a deficient number, since it is larger than the sum of its proper divisors (24395309549555).

61500501065605 is a wasteful number, since it uses less digits than its factorization.

61500501065605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134887669 (or 134887662 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 61500501065605 in words is "sixty-one trillion, five hundred billion, five hundred one million, sixty-five thousand, six hundred five".