1631120664 has 32 divisors (see below), whose sum is σ = 4292424000. Its totient is φ = 515090592.

The previous prime is 1631120657. The next prime is 1631120713. The reversal of 1631120664 is 4660211361.

It is a congruent number.

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, 1788054 + ... + 1788965.

It is an arithmetic number, because the mean of its divisors is an integer number (134138250).

Almost surely, 2^1631120664 is an apocalyptic number.

It is an amenable number.

1631120664 is an abundant number, since it is smaller than the sum of its proper divisors (2661303336).

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

1631120664 is a wasteful number, since it uses less digits than its factorization.

1631120664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3577047 (or 3577043 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1631120664 is about 40387.1348822865. The cubic root of 1631120664 is about 1177.1415693142.

The spelling of 1631120664 in words is "one billion, six hundred thirty-one million, one hundred twenty thousand, six hundred sixty-four".