63213544621456 has 10 divisors (see below), whose sum is σ = 122476242704102. Its totient is φ = 31606772310720.

The previous prime is 63213544621429. The next prime is 63213544621463. The reversal of 63213544621456 is 65412644531236.

It can be written as a sum of positive squares in only one way, i.e., 58416060441600 + 4797484179856 = 7643040^2 + 2190316^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1975423269405 + ... + 1975423269436.

Almost surely, 2^{63213544621456} is an apocalyptic number.

It is an amenable number.

63213544621456 is a deficient number, since it is larger than the sum of its proper divisors (59262698082646).

63213544621456 is a wasteful number, since it uses less digits than its factorization.

63213544621456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3950846538849 (or 3950846538843 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 52.

The spelling of 63213544621456 in words is "sixty-three trillion, two hundred thirteen billion, five hundred forty-four million, six hundred twenty-one thousand, four hundred fifty-six".