63751134991 has 2 divisors, whose sum is σ = 63751134992. Its totient is φ = 63751134990.

The previous prime is 63751134989. The next prime is 63751135003. The reversal of 63751134991 is 19943115736.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63751134991 - 2¹ = 63751134989 is a prime.

It is a super-3 number, since 3×63751134991³ (a number of 33 digits) contains 333 as substring.

Together with 63751134989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63751134961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31875567495 + 31875567496.

It is an arithmetic number, because the mean of its divisors is an integer number (31875567496).

Almost surely, 2^63751134991 is an apocalyptic number.

63751134991 is a deficient number, since it is larger than the sum of its proper divisors (1).

63751134991 is an equidigital number, since it uses as much as digits as its factorization.

63751134991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 49.

The spelling of 63751134991 in words is "sixty-three billion, seven hundred fifty-one million, one hundred thirty-four thousand, nine hundred ninety-one".