63405475231 has 16 divisors (see below), whose sum is σ = 72573390400. Its totient is φ = 54265137408.

The previous prime is 63405475181. The next prime is 63405475247. The reversal of 63405475231 is 13257450436.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 63405475231 - 2⁷ = 63405475103 is a prime.

It is a super-2 number, since 2×63405475231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63405475831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18796261 + ... + 18799633.

It is an arithmetic number, because the mean of its divisors is an integer number (4535836900).

Almost surely, 2^63405475231 is an apocalyptic number.

63405475231 is a deficient number, since it is larger than the sum of its proper divisors (9167915169).

63405475231 is a wasteful number, since it uses less digits than its factorization.

63405475231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6658.

The product of its (nonzero) digits is 302400, while the sum is 40.

The spelling of 63405475231 in words is "sixty-three billion, four hundred five million, four hundred seventy-five thousand, two hundred thirty-one".