1681773580 has 24 divisors (see below), whose sum is σ = 3627178128. Its totient is φ = 654527808.

The previous prime is 1681773563. The next prime is 1681773589. The reversal of 1681773580 is 853771861.

It is a self number, because there is not a number n which added to its sum of digits gives 1681773580.

It is not an unprimeable number, because it can be changed into a prime (1681773589) 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, 1135594 + ... + 1137073.

It is an arithmetic number, because the mean of its divisors is an integer number (151132422).

Almost surely, 2^1681773580 is an apocalyptic number.

1681773580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1681773580 is an abundant number, since it is smaller than the sum of its proper divisors (1945404548).

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

1681773580 is a wasteful number, since it uses less digits than its factorization.

1681773580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272713 (or 2272711 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 1681773580 is about 41009.4328173409. The cubic root of 1681773580 is about 1189.2025775973.

The spelling of 1681773580 in words is "one billion, six hundred eighty-one million, seven hundred seventy-three thousand, five hundred eighty".