63021645513416 has 32 divisors (see below), whose sum is σ = 118253607334200. Its totient is φ = 31487351808000.

The previous prime is 63021645513397. The next prime is 63021645513419. The reversal of 63021645513416 is 61431554612036.

It can be written as a sum of positive squares in 4 ways, for example, as 41630188005316 + 21391457508100 = 6452146^2 + 4625090^2 .

It is not an unprimeable number, because it can be changed into a prime (63021645513419) 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, 388814246 + ... + 388976298.

Almost surely, 2^{63021645513416} is an apocalyptic number.

It is an amenable number.

63021645513416 is a deficient number, since it is larger than the sum of its proper divisors (55231961820784).

63021645513416 is a wasteful number, since it uses less digits than its factorization.

63021645513416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197969 (or 197965 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 63021645513416 in words is "sixty-three trillion, twenty-one billion, six hundred forty-five million, five hundred thirteen thousand, four hundred sixteen".