63915533412 has 12 divisors (see below), whose sum is σ = 149136244656. Its totient is φ = 21305177800.

The previous prime is 63915533411. The next prime is 63915533441. The reversal of 63915533412 is 21433551936.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×63915533412² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63915533411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2663147214 + ... + 2663147237.

It is an arithmetic number, because the mean of its divisors is an integer number (12428020388).

Almost surely, 2^63915533412 is an apocalyptic number.

It is an amenable number.

63915533412 is an abundant number, since it is smaller than the sum of its proper divisors (85220711244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63915533412 is a wasteful number, since it uses less digits than its factorization.

63915533412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5326294458 (or 5326294456 counting only the distinct ones).

The product of its digits is 291600, while the sum is 42.

The spelling of 63915533412 in words is "sixty-three billion, nine hundred fifteen million, five hundred thirty-three thousand, four hundred twelve".