1691114681557 has 16 divisors (see below), whose sum is σ = 1937827382400. Its totient is φ = 1445683809600.

The previous prime is 1691114681537. The next prime is 1691114681579. The reversal of 1691114681557 is 7551864111961.

It is a cyclic number.

It is not a de Polignac number, because 1691114681557 - 2⁷ = 1691114681429 is a prime.

It is a super-3 number, since 3×1691114681557³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1691114681498 and 1691114681507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1691114681537) 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, 60597307 + ... + 60625207.

It is an arithmetic number, because the mean of its divisors is an integer number (121114211400).

Almost surely, 2^{1691114681557} is an apocalyptic number.

It is an amenable number.

1691114681557 is a deficient number, since it is larger than the sum of its proper divisors (246712700843).

1691114681557 is a wasteful number, since it uses less digits than its factorization.

1691114681557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50556.

The product of its digits is 1814400, while the sum is 55.

The spelling of 1691114681557 in words is "one trillion, six hundred ninety-one billion, one hundred fourteen million, six hundred eighty-one thousand, five hundred fifty-seven".