1491167447611 has 16 divisors (see below), whose sum is σ = 1550892407040. Its totient is φ = 1432008555040.

The previous prime is 1491167447597. The next prime is 1491167447663. The reversal of 1491167447611 is 1167447611941.

It is a cyclic number.

It is not a de Polignac number, because 1491167447611 - 2¹¹ = 1491167445563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491167447311) 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, 6677220 + ... + 6896926.

It is an arithmetic number, because the mean of its divisors is an integer number (96930775440).

Almost surely, 2^{1491167447611} is an apocalyptic number.

1491167447611 is a deficient number, since it is larger than the sum of its proper divisors (59724959429).

1491167447611 is a wasteful number, since it uses less digits than its factorization.

1491167447611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220994.

The product of its digits is 1016064, while the sum is 52.

The spelling of 1491167447611 in words is "one trillion, four hundred ninety-one billion, one hundred sixty-seven million, four hundred forty-seven thousand, six hundred eleven".