61648394007311 has 4 divisors (see below), whose sum is σ = 61831326927552. Its totient is φ = 61465461087072.

The previous prime is 61648394007289. The next prime is 61648394007323. The reversal of 61648394007311 is 11370049384616.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61648394007311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61648394007391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91466459615 + ... + 91466460288.

It is an arithmetic number, because the mean of its divisors is an integer number (15457831731888).

Almost surely, 2^{61648394007311} is an apocalyptic number.

61648394007311 is a deficient number, since it is larger than the sum of its proper divisors (182932920241).

61648394007311 is a wasteful number, since it uses less digits than its factorization.

61648394007311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182932920240.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 61648394007311 in words is "sixty-one trillion, six hundred forty-eight billion, three hundred ninety-four million, seven thousand, three hundred eleven".