61644148376794 has 4 divisors (see below), whose sum is σ = 92466222565194. Its totient is φ = 30822074188396.

The previous prime is 61644148376791. The next prime is 61644148376849. The reversal of 61644148376794 is 49767384144616.

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

It can be written as a sum of positive squares in only one way, i.e., 50028559709569 + 11615588667225 = 7073087^2 + 3408165^2 .

It is not an unprimeable number, because it can be changed into a prime (61644148376791) 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 as a sum of consecutive naturals, namely, 15411037094197 + ... + 15411037094200.

Almost surely, 2^{61644148376794} is an apocalyptic number.

61644148376794 is a deficient number, since it is larger than the sum of its proper divisors (30822074188400).

61644148376794 is a wasteful number, since it uses less digits than its factorization.

61644148376794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30822074188399.

The product of its digits is 585252864, while the sum is 70.

The spelling of 61644148376794 in words is "sixty-one trillion, six hundred forty-four billion, one hundred forty-eight million, three hundred seventy-six thousand, seven hundred ninety-four".