1690543799856 has 80 divisors (see below), whose sum is σ = 4852823685120. Its totient is φ = 563475481920.

The previous prime is 1690543799851. The next prime is 1690543799921. The reversal of 1690543799856 is 6589973450961.

1690543799856 is a `hidden beast` number, since 1 + 6 + 9 + 0 + 543 + 79 + 9 + 8 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (1690543799851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6465421 + ... + 6721811.

It is an arithmetic number, because the mean of its divisors is an integer number (60660296064).

Almost surely, 2^{1690543799856} is an apocalyptic number.

1690543799856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1690543799856 is an abundant number, since it is smaller than the sum of its proper divisors (3162279885264).

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

1690543799856 is a wasteful number, since it uses less digits than its factorization.

1690543799856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271671 (or 271659 counting only the distinct ones).

The product of its (nonzero) digits is 440899200, while the sum is 72.

The spelling of 1690543799856 in words is "one trillion, six hundred ninety billion, five hundred forty-three million, seven hundred ninety-nine thousand, eight hundred fifty-six".