1691319836016 has 80 divisors (see below), whose sum is σ = 4886864958720. Its totient is φ = 560039659200.

The previous prime is 1691319835999. The next prime is 1691319836039. The reversal of 1691319836016 is 6106389131961.

It is a happy number.

1691319836016 is a `hidden beast` number, since 1 + 6 + 9 + 13 + 19 + 8 + 3 + 601 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12898650 + ... + 13029113.

It is an arithmetic number, because the mean of its divisors is an integer number (61085811984).

Almost surely, 2^{1691319836016} is an apocalyptic number.

1691319836016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1691319836016 is an abundant number, since it is smaller than the sum of its proper divisors (3195545122704).

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

1691319836016 is a wasteful number, since it uses less digits than its factorization.

1691319836016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25927931 (or 25927919 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The spelling of 1691319836016 in words is "one trillion, six hundred ninety-one billion, three hundred nineteen million, eight hundred thirty-six thousand, sixteen".