1369869806491 has 16 divisors (see below), whose sum is σ = 1431385331040. Its totient is φ = 1309310732800.

The previous prime is 1369869806449. The next prime is 1369869806573. The reversal of 1369869806491 is 1946089689631.

It is a cyclic number.

It is not a de Polignac number, because 1369869806491 - 2¹⁹ = 1369869282203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1369869806491.

It is not an unprimeable number, because it can be changed into a prime (1369869806411) 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, 18289380 + ... + 18364126.

It is an arithmetic number, because the mean of its divisors is an integer number (89461583190).

Almost surely, 2^{1369869806491} is an apocalyptic number.

1369869806491 is a deficient number, since it is larger than the sum of its proper divisors (61515524549).

1369869806491 is a wasteful number, since it uses less digits than its factorization.

1369869806491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81134.

The product of its (nonzero) digits is 120932352, while the sum is 70.

The spelling of 1369869806491 in words is "one trillion, three hundred sixty-nine billion, eight hundred sixty-nine million, eight hundred six thousand, four hundred ninety-one".