63505261404 has 72 divisors (see below), whose sum is σ = 183044599920. Its totient is φ = 18390661632.

The previous prime is 63505261381. The next prime is 63505261471. The reversal of 63505261404 is 40416250536.

63505261404 is a `hidden beast` number, since 6 + 3 + 505 + 2 + 6 + 140 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 3983074 + ... + 3998985.

It is an arithmetic number, because the mean of its divisors is an integer number (2542286110).

Almost surely, 2^63505261404 is an apocalyptic number.

It is an amenable number.

63505261404 is an abundant number, since it is smaller than the sum of its proper divisors (119539338516).

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

63505261404 is a wasteful number, since it uses less digits than its factorization.

63505261404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7982099 (or 7982094 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 63505261404 in words is "sixty-three billion, five hundred five million, two hundred sixty-one thousand, four hundred four".