29531631648 has 48 divisors (see below), whose sum is σ = 77580629280. Its totient is φ = 9836246016.

The previous prime is 29531631637. The next prime is 29531631671. The reversal of 29531631648 is 84613613592.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 29531631597 and 29531631606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5923 + ... + 243101.

It is an arithmetic number, because the mean of its divisors is an integer number (1616263110).

Almost surely, 2^29531631648 is an apocalyptic number.

It is an amenable number.

29531631648 is an abundant number, since it is smaller than the sum of its proper divisors (48048997632).

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

29531631648 is a wasteful number, since it uses less digits than its factorization.

29531631648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238489 (or 238481 counting only the distinct ones).

The product of its digits is 933120, while the sum is 48.

The spelling of 29531631648 in words is "twenty-nine billion, five hundred thirty-one million, six hundred thirty-one thousand, six hundred forty-eight".