63251078891 has 24 divisors (see below), whose sum is σ = 85391161344. Its totient is φ = 45495272160.

The previous prime is 63251078879. The next prime is 63251078909. The reversal of 63251078891 is 19887015236.

It is not a de Polignac number, because 63251078891 - 2²⁶ = 63183970027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63251098891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2417291 + ... + 2443316.

It is an arithmetic number, because the mean of its divisors is an integer number (3557965056).

Almost surely, 2^63251078891 is an apocalyptic number.

63251078891 is a deficient number, since it is larger than the sum of its proper divisors (22140082453).

63251078891 is a wasteful number, since it uses less digits than its factorization.

63251078891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4860651 (or 4860638 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 63251078891 in words is "sixty-three billion, two hundred fifty-one million, seventy-eight thousand, eight hundred ninety-one".