63991262363 has 32 divisors (see below), whose sum is σ = 77425920000. Its totient is φ = 51663868416.

The previous prime is 63991262347. The next prime is 63991262369. The reversal of 63991262363 is 36326219936.

It is a cyclic number.

It is not a de Polignac number, because 63991262363 - 2⁴ = 63991262347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63991262369) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32010638 + ... + 32012636.

It is an arithmetic number, because the mean of its divisors is an integer number (2419560000).

Almost surely, 2^63991262363 is an apocalyptic number.

63991262363 is a deficient number, since it is larger than the sum of its proper divisors (13434657637).

63991262363 is a wasteful number, since it uses less digits than its factorization.

63991262363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291.

The product of its digits is 1889568, while the sum is 50.

The spelling of 63991262363 in words is "sixty-three billion, nine hundred ninety-one million, two hundred sixty-two thousand, three hundred sixty-three".