48277218139721 has 2 divisors, whose sum is σ = 48277218139722. Its totient is φ = 48277218139720.

The previous prime is 48277218139697. The next prime is 48277218139763. The reversal of 48277218139721 is 12793181277284.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26060371564096 + 22216846575625 = 5104936^2 + 4713475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-48277218139721 is a prime.

It is not a weakly prime, because it can be changed into another prime (48277218139781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24138609069860 + 24138609069861.

It is an arithmetic number, because the mean of its divisors is an integer number (24138609069861).

Almost surely, 2^{48277218139721} is an apocalyptic number.

It is an amenable number.

48277218139721 is a deficient number, since it is larger than the sum of its proper divisors (1).

48277218139721 is an equidigital number, since it uses as much as digits as its factorization.

48277218139721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18966528, while the sum is 62.

The spelling of 48277218139721 in words is "forty-eight trillion, two hundred seventy-seven billion, two hundred eighteen million, one hundred thirty-nine thousand, seven hundred twenty-one".