63690765331 has 2 divisors, whose sum is σ = 63690765332. Its totient is φ = 63690765330.

The previous prime is 63690765329. The next prime is 63690765361. The reversal of 63690765331 is 13356709636.

It is a happy number.

63690765331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63690765331 - 2¹ = 63690765329 is a prime.

It is a super-2 number, since 2×63690765331² (a number of 22 digits) contains 22 as substring.

Together with 63690765329, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (63690765311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31845382665 + 31845382666.

It is an arithmetic number, because the mean of its divisors is an integer number (31845382666).

Almost surely, 2^63690765331 is an apocalyptic number.

63690765331 is a deficient number, since it is larger than the sum of its proper divisors (1).

63690765331 is an equidigital number, since it uses as much as digits as its factorization.

63690765331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1837080, while the sum is 49.

The spelling of 63690765331 in words is "sixty-three billion, six hundred ninety million, seven hundred sixty-five thousand, three hundred thirty-one".