1349687691571 has 16 divisors (see below), whose sum is σ = 1387979647200. Its totient is φ = 1311944224000.

The previous prime is 1349687691463. The next prime is 1349687691613. The reversal of 1349687691571 is 1751967869431.

It is a cyclic number.

It is not a de Polignac number, because 1349687691571 - 2⁹ = 1349687691059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1349687691497 and 1349687691506.

It is not an unprimeable number, because it can be changed into a prime (1349687691371) 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, 4385985 + ... + 4683613.

It is an arithmetic number, because the mean of its divisors is an integer number (86748727950).

Almost surely, 2^{1349687691571} is an apocalyptic number.

1349687691571 is a deficient number, since it is larger than the sum of its proper divisors (38291955629).

1349687691571 is a wasteful number, since it uses less digits than its factorization.

1349687691571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298550.

The product of its digits is 68584320, while the sum is 67.

The spelling of 1349687691571 in words is "one trillion, three hundred forty-nine billion, six hundred eighty-seven million, six hundred ninety-one thousand, five hundred seventy-one".