63667543780385 has 32 divisors (see below), whose sum is σ = 76720734558720. Its totient is φ = 50721408672768.

The previous prime is 63667543780367. The next prime is 63667543780409. The reversal of 63667543780385 is 58308734576636.

It is a cyclic number.

It is not a de Polignac number, because 63667543780385 - 2²⁸ = 63667275344929 is a prime.

It is a super-2 number, since 2×63667543780385² (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 31 ways as a sum of consecutive naturals, for example, 5664870596 + ... + 5664881834.

It is an arithmetic number, because the mean of its divisors is an integer number (2397522954960).

Almost surely, 2^{63667543780385} is an apocalyptic number.

It is an amenable number.

63667543780385 is a deficient number, since it is larger than the sum of its proper divisors (13053190778335).

63667543780385 is a wasteful number, since it uses less digits than its factorization.

63667543780385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16337.

The product of its (nonzero) digits is 1828915200, while the sum is 71.

The spelling of 63667543780385 in words is "sixty-three trillion, six hundred sixty-seven billion, five hundred forty-three million, seven hundred eighty thousand, three hundred eighty-five".