1669712139731 has 8 divisors (see below), whose sum is σ = 1670256458640. Its totient is φ = 1669167920992.

The previous prime is 1669712139709. The next prime is 1669712139787. The reversal of 1669712139731 is 1379312179661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1669712139731 is a prime.

It is a super-2 number, since 2×1669712139731² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1669712139791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45866885 + ... + 45903273.

It is an arithmetic number, because the mean of its divisors is an integer number (208782057330).

Almost surely, 2^{1669712139731} is an apocalyptic number.

1669712139731 is a deficient number, since it is larger than the sum of its proper divisors (544318909).

1669712139731 is an equidigital number, since it uses as much as digits as its factorization.

1669712139731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50085.

The product of its digits is 2571912, while the sum is 56.

The spelling of 1669712139731 in words is "one trillion, six hundred sixty-nine billion, seven hundred twelve million, one hundred thirty-nine thousand, seven hundred thirty-one".