1681272472 has 16 divisors (see below), whose sum is σ = 3438966600. Its totient is φ = 764214720.

The previous prime is 1681272457. The next prime is 1681272479. The reversal of 1681272472 is 2742721861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681272479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9552597 + ... + 9552772.

Almost surely, 2^1681272472 is an apocalyptic number.

It is an amenable number.

1681272472 is an abundant number, since it is smaller than the sum of its proper divisors (1757694128).

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

1681272472 is a wasteful number, since it uses less digits than its factorization.

1681272472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19105386 (or 19105382 counting only the distinct ones).

The product of its digits is 75264, while the sum is 40.

The square root of 1681272472 is about 41003.3226946305. The cubic root of 1681272472 is about 1189.0844526746.

The spelling of 1681272472 in words is "one billion, six hundred eighty-one million, two hundred seventy-two thousand, four hundred seventy-two".