61003848726721 has 8 divisors (see below), whose sum is σ = 61055523770760. Its totient is φ = 60952174589952.

The previous prime is 61003848726649. The next prime is 61003848726727. The reversal of 61003848726721 is 12762784830016.

It can be written as a sum of positive squares in 4 ways, for example, as 4655345640625 + 56348503086096 = 2157625^2 + 7506564^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61003848726721 - 2¹¹ = 61003848724673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61003848726727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262115821 + ... + 262348453.

It is an arithmetic number, because the mean of its divisors is an integer number (7631940471345).

Almost surely, 2^{61003848726721} is an apocalyptic number.

It is an amenable number.

61003848726721 is a deficient number, since it is larger than the sum of its proper divisors (51675044039).

61003848726721 is a wasteful number, since it uses less digits than its factorization.

61003848726721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453635.

The product of its (nonzero) digits is 5419008, while the sum is 55.

The spelling of 61003848726721 in words is "sixty-one trillion, three billion, eight hundred forty-eight million, seven hundred twenty-six thousand, seven hundred twenty-one".