1691400318 has 16 divisors (see below), whose sum is σ = 3440136960. Its totient is φ = 554244056.

The previous prime is 1691400317. The next prime is 1691400353. The reversal of 1691400318 is 8130041961.

1691400318 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1691400318² = 5721670071461002248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1691400317) 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, 2388630 + ... + 2389337.

It is an arithmetic number, because the mean of its divisors is an integer number (215008560).

Almost surely, 2^1691400318 is an apocalyptic number.

1691400318 is an abundant number, since it is smaller than the sum of its proper divisors (1748736642).

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

1691400318 is a wasteful number, since it uses less digits than its factorization.

1691400318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4778031.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 1691400318 is about 41126.6375722597. The cubic root of 1691400318 is about 1191.4673230466.

The spelling of 1691400318 in words is "one billion, six hundred ninety-one million, four hundred thousand, three hundred eighteen".