61742552301665 has 4 divisors (see below), whose sum is σ = 74091062762004. Its totient is φ = 49394041841328.

The previous prime is 61742552301659. The next prime is 61742552301691. The reversal of 61742552301665 is 56610325524716.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48406207906849 + 13336344394816 = 6957457^2 + 3651896^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61742552301665 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6174255230162 + ... + 6174255230171.

It is an arithmetic number, because the mean of its divisors is an integer number (18522765690501).

Almost surely, 2^{61742552301665} is an apocalyptic number.

It is an amenable number.

61742552301665 is a deficient number, since it is larger than the sum of its proper divisors (12348510460339).

61742552301665 is a wasteful number, since it uses less digits than its factorization.

61742552301665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12348510460338.

The product of its (nonzero) digits is 9072000, while the sum is 53.

The spelling of 61742552301665 in words is "sixty-one trillion, seven hundred forty-two billion, five hundred fifty-two million, three hundred one thousand, six hundred sixty-five".