1681554432 has 88 divisors (see below), whose sum is σ = 4499076736. Its totient is φ = 558379008.

The previous prime is 1681554389. The next prime is 1681554437. The reversal of 1681554432 is 2344551861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681554437) 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, 942213 + ... + 943995.

It is an arithmetic number, because the mean of its divisors is an integer number (51125872).

Almost surely, 2^1681554432 is an apocalyptic number.

1681554432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1681554432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2249538368).

1681554432 is an abundant number, since it is smaller than the sum of its proper divisors (2817522304).

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

1681554432 is a wasteful number, since it uses less digits than its factorization.

1681554432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113 (or 2095 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The square root of 1681554432 is about 41006.7608084326. The cubic root of 1681554432 is about 1189.1509212804.

The spelling of 1681554432 in words is "one billion, six hundred eighty-one million, five hundred fifty-four thousand, four hundred thirty-two".