63586321491 has 64 divisors (see below), whose sum is σ = 109368999936. Its totient is φ = 31890931200.

The previous prime is 63586321483. The next prime is 63586321511. The reversal of 63586321491 is 19412368536.

It is not a de Polignac number, because 63586321491 - 2³ = 63586321483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63586321491.

It is not an unprimeable number, because it can be changed into a prime (63586321451) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3090460 + ... + 3110966.

It is an arithmetic number, because the mean of its divisors is an integer number (1708890624).

Almost surely, 2^63586321491 is an apocalyptic number.

63586321491 is a deficient number, since it is larger than the sum of its proper divisors (45782678445).

63586321491 is a wasteful number, since it uses less digits than its factorization.

63586321491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20992.

The product of its digits is 933120, while the sum is 48.

The spelling of 63586321491 in words is "sixty-three billion, five hundred eighty-six million, three hundred twenty-one thousand, four hundred ninety-one".