63531551044 has 24 divisors (see below), whose sum is σ = 119749757400. Its totient is φ = 29318037504.

The previous prime is 63531551009. The next prime is 63531551129. The reversal of 63531551044 is 44015513536.

It can be written as a sum of positive squares in 4 ways, for example, as 67864644 + 63463686400 = 8238^2 + 251920^2 .

It is a junction number, because it is equal to n+sod(n) for n = 63531550994 and 63531551012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292932 + ... + 461380.

It is an arithmetic number, because the mean of its divisors is an integer number (4989573225).

Almost surely, 2^63531551044 is an apocalyptic number.

It is an amenable number.

63531551044 is a deficient number, since it is larger than the sum of its proper divisors (56218206356).

63531551044 is a wasteful number, since it uses less digits than its factorization.

63531551044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175719 (or 175717 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 63531551044 in words is "sixty-three billion, five hundred thirty-one million, five hundred fifty-one thousand, forty-four".