63667131420 has 24 divisors (see below), whose sum is σ = 178267968144. Its totient is φ = 16977901696.

The previous prime is 63667131413. The next prime is 63667131421. The reversal of 63667131420 is 2413176636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63667131421) 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 7 ways as a sum of consecutive naturals, for example, 530559369 + ... + 530559488.

It is an arithmetic number, because the mean of its divisors is an integer number (7427832006).

Almost surely, 2^63667131420 is an apocalyptic number.

63667131420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63667131420 is an abundant number, since it is smaller than the sum of its proper divisors (114600836724).

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

63667131420 is a wasteful number, since it uses less digits than its factorization.

63667131420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061118869 (or 1061118867 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The spelling of 63667131420 in words is "sixty-three billion, six hundred sixty-seven million, one hundred thirty-one thousand, four hundred twenty".