1631280968 has 32 divisors (see below), whose sum is σ = 3246415200. Its totient is φ = 765802752.

The previous prime is 1631280961. The next prime is 1631280979. The reversal of 1631280968 is 8690821361.

It is a super-2 number, since 2×1631280968² = 5322155193118034048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1631280961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42671 + ... + 71297.

It is an arithmetic number, because the mean of its divisors is an integer number (101450475).

Almost surely, 2^1631280968 is an apocalyptic number.

It is an amenable number.

1631280968 is a deficient number, since it is larger than the sum of its proper divisors (1615134232).

1631280968 is a wasteful number, since it uses less digits than its factorization.

1631280968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29069 (or 29065 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 1631280968 is about 40389.1194259048. The cubic root of 1631280968 is about 1177.1801305980.

The spelling of 1631280968 in words is "one billion, six hundred thirty-one million, two hundred eighty thousand, nine hundred sixty-eight".