63813267580781 has 8 divisors (see below), whose sum is σ = 63898880579040. Its totient is φ = 63727684774992.

The previous prime is 63813267580753. The next prime is 63813267580813. The reversal of 63813267580781 is 18708576231836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63813267580781 - 2³⁰ = 63812193838957 is a prime.

It is a super-2 number, since 2×63813267580781² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63813267580481) 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, 3316595 + ... + 11773968.

It is an arithmetic number, because the mean of its divisors is an integer number (7987360072380).

Almost surely, 2^{63813267580781} is an apocalyptic number.

It is an amenable number.

63813267580781 is a deficient number, since it is larger than the sum of its proper divisors (85612998259).

63813267580781 is a wasteful number, since it uses less digits than its factorization.

63813267580781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15096235.

The product of its (nonzero) digits is 81285120, while the sum is 65.

The spelling of 63813267580781 in words is "sixty-three trillion, eight hundred thirteen billion, two hundred sixty-seven million, five hundred eighty thousand, seven hundred eighty-one".