1698874161680 has 40 divisors (see below), whose sum is σ = 3950329834584. Its totient is φ = 679472691200.

The previous prime is 1698874161653. The next prime is 1698874161707. The reversal of 1698874161680 is 861614788961.

It is an interprime number because it is at equal distance from previous prime (1698874161653) and next prime (1698874161707).

It can be written as a sum of positive squares in 4 ways, for example, as 294753439744 + 1404120721936 = 542912^2 + 1184956^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×1698874161680³ (a number of 38 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489401 + ... + 1907160.

Almost surely, 2^{1698874161680} is an apocalyptic number.

1698874161680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1698874161680 is an abundant number, since it is smaller than the sum of its proper divisors (2251455672904).

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

1698874161680 is a wasteful number, since it uses less digits than its factorization.

1698874161680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2405435 (or 2405429 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 65.

The spelling of 1698874161680 in words is "one trillion, six hundred ninety-eight billion, eight hundred seventy-four million, one hundred sixty-one thousand, six hundred eighty".