63613435391 has 12 divisors (see below), whose sum is σ = 70563708600. Its totient is φ = 57299829840.

The previous prime is 63613435381. The next prime is 63613435421. The reversal of 63613435391 is 19353431636.

It is a de Polignac number, because none of the positive numbers 2^k-63613435391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63613435381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2398421 + ... + 2424798.

It is an arithmetic number, because the mean of its divisors is an integer number (5880309050).

Almost surely, 2^63613435391 is an apocalyptic number.

63613435391 is a deficient number, since it is larger than the sum of its proper divisors (6950273209).

63613435391 is a wasteful number, since it uses less digits than its factorization.

63613435391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4823350 (or 4823339 counting only the distinct ones).

The product of its digits is 524880, while the sum is 44.

The spelling of 63613435391 in words is "sixty-three billion, six hundred thirteen million, four hundred thirty-five thousand, three hundred ninety-one".