63251731536431 has 2 divisors, whose sum is σ = 63251731536432. Its totient is φ = 63251731536430.

The previous prime is 63251731536373. The next prime is 63251731536503. The reversal of 63251731536431 is 13463513715236.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63251731536431 is a prime.

It is a super-2 number, since 2×63251731536431² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 63251731536431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63251731530431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31625865768215 + 31625865768216.

It is an arithmetic number, because the mean of its divisors is an integer number (31625865768216).

Almost surely, 2^{63251731536431} is an apocalyptic number.

63251731536431 is a deficient number, since it is larger than the sum of its proper divisors (1).

63251731536431 is an equidigital number, since it uses as much as digits as its factorization.

63251731536431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4082400, while the sum is 50.

The spelling of 63251731536431 in words is "sixty-three trillion, two hundred fifty-one billion, seven hundred thirty-one million, five hundred thirty-six thousand, four hundred thirty-one".