1631665440111 has 16 divisors (see below), whose sum is σ = 2594449396224. Its totient is φ = 891841979424.

The previous prime is 1631665440071. The next prime is 1631665440133. The reversal of 1631665440111 is 1110445661361.

It is not a de Polignac number, because 1631665440111 - 2¹³ = 1631665431919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1631665440111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631665440191) 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, 1689094176 + ... + 1689095141.

It is an arithmetic number, because the mean of its divisors is an integer number (162153087264).

Almost surely, 2^{1631665440111} is an apocalyptic number.

1631665440111 is a deficient number, since it is larger than the sum of its proper divisors (962783956113).

1631665440111 is a wasteful number, since it uses less digits than its factorization.

1631665440111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378189350.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 1631665440111 in words is "one trillion, six hundred thirty-one billion, six hundred sixty-five million, four hundred forty thousand, one hundred eleven".