140771984079169 has 3 divisors (see below), whose sum is σ = 140771995943907. Its totient is φ = 140771972214432.

The previous prime is 140771984079149. The next prime is 140771984079247. The reversal of 140771984079169 is 961970489177041.

The square root of 140771984079169 is 11864737.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 85511909980225 + 55260074098944 = 9247265^2 + 7433712^2 .

It is not a de Polignac number, because 140771984079169 - 2²¹ = 140771981982017 is a prime.

It is a super-2 number, since 2×140771984079169² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140771984079149) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5932369 + ... + 17797105.

It is an arithmetic number, because the mean of its divisors is an integer number (46923998647969).

Almost surely, 2^{140771984079169} is an apocalyptic number.

140771984079169 is the 11864737-th square number.

140771984079169 is the 5932369-th centered octagonal number.

It is an amenable number.

140771984079169 is a deficient number, since it is larger than the sum of its proper divisors (11864738).

140771984079169 is an frugal number, since it uses more digits than its factorization.

140771984079169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23729474 (or 11864737 counting only the distinct ones).

The product of its (nonzero) digits is 192036096, while the sum is 73.

The spelling of 140771984079169 in words is "one hundred forty trillion, seven hundred seventy-one billion, nine hundred eighty-four million, seventy-nine thousand, one hundred sixty-nine".