63216436949 has 2 divisors, whose sum is σ = 63216436950. Its totient is φ = 63216436948.

The previous prime is 63216436919. The next prime is 63216436981. The reversal of 63216436949 is 94963461236.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59953971025 + 3262465924 = 244855^2 + 57118^2 .

It is a cyclic number.

It is not a de Polignac number, because 63216436949 - 2⁸ = 63216436693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63216436949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63216436919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31608218474 + 31608218475.

It is an arithmetic number, because the mean of its divisors is an integer number (31608218475).

Almost surely, 2^63216436949 is an apocalyptic number.

It is an amenable number.

63216436949 is a deficient number, since it is larger than the sum of its proper divisors (1).

63216436949 is an equidigital number, since it uses as much as digits as its factorization.

63216436949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 53.

The spelling of 63216436949 in words is "sixty-three billion, two hundred sixteen million, four hundred thirty-six thousand, nine hundred forty-nine".