3159781313779 has 4 divisors (see below), whose sum is σ = 3245180808784. Its totient is φ = 3074381818776.

The previous prime is 3159781313771. The next prime is 3159781313791. The reversal of 3159781313779 is 9773131879513.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3159781313779 - 2³ = 3159781313771 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 3159781313779.

It is not an unprimeable number, because it can be changed into a prime (3159781313771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42699747447 + ... + 42699747520.

It is an arithmetic number, because the mean of its divisors is an integer number (811295202196).

Almost surely, 2^{3159781313779} is an apocalyptic number.

3159781313779 is a deficient number, since it is larger than the sum of its proper divisors (85399495005).

3159781313779 is an equidigital number, since it uses as much as digits as its factorization.

3159781313779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85399495004.

The product of its digits is 30005640, while the sum is 64.

The spelling of 3159781313779 in words is "three trillion, one hundred fifty-nine billion, seven hundred eighty-one million, three hundred thirteen thousand, seven hundred seventy-nine".