49847147883821 has 2 divisors, whose sum is σ = 49847147883822. Its totient is φ = 49847147883820.

The previous prime is 49847147883817. The next prime is 49847147883887. The reversal of 49847147883821 is 12838874174894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47407163301796 + 2439984582025 = 6885286^2 + 1562045^2 .

It is a cyclic number.

It is not a de Polignac number, because 49847147883821 - 2² = 49847147883817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49847147883721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24923573941910 + 24923573941911.

It is an arithmetic number, because the mean of its divisors is an integer number (24923573941911).

Almost surely, 2^{49847147883821} is an apocalyptic number.

It is an amenable number.

49847147883821 is a deficient number, since it is larger than the sum of its proper divisors (1).

49847147883821 is an equidigital number, since it uses as much as digits as its factorization.

49847147883821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 693633024, while the sum is 74.

The spelling of 49847147883821 in words is "forty-nine trillion, eight hundred forty-seven billion, one hundred forty-seven million, eight hundred eighty-three thousand, eight hundred twenty-one".