63538253786512 has 20 divisors (see below), whose sum is σ = 125428109481180. Its totient is φ = 31169709404288.

The previous prime is 63538253786461. The next prime is 63538253786569. The reversal of 63538253786512 is 21568735283536.

It can be written as a sum of positive squares in 2 ways, for example, as 31734925157376 + 31803328629136 = 5633376^2 + 5639444^2 .

It is a super-2 number, since 2×63538253786512² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37463592187 + ... + 37463593882.

It is an arithmetic number, because the mean of its divisors is an integer number (6271405474059).

Almost surely, 2^{63538253786512} is an apocalyptic number.

It is an amenable number.

63538253786512 is a deficient number, since it is larger than the sum of its proper divisors (61889855694668).

63538253786512 is a wasteful number, since it uses less digits than its factorization.

63538253786512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74927186130 (or 74927186124 counting only the distinct ones).

The product of its digits is 217728000, while the sum is 64.

The spelling of 63538253786512 in words is "sixty-three trillion, five hundred thirty-eight billion, two hundred fifty-three million, seven hundred eighty-six thousand, five hundred twelve".