3196859887781 has 4 divisors (see below), whose sum is σ = 3653554157472. Its totient is φ = 2740165618092.

The previous prime is 3196859887757. The next prime is 3196859887783. The reversal of 3196859887781 is 1877889586913.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3196859887781 - 2¹⁸ = 3196859625637 is a prime.

It is a super-2 number, since 2×3196859887781² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3196859887696 and 3196859887705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3196859887783) 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, 228347134835 + ... + 228347134848.

It is an arithmetic number, because the mean of its divisors is an integer number (913388539368).

Almost surely, 2^{3196859887781} is an apocalyptic number.

It is an amenable number.

3196859887781 is a deficient number, since it is larger than the sum of its proper divisors (456694269691).

3196859887781 is an equidigital number, since it uses as much as digits as its factorization.

3196859887781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456694269690.

The product of its digits is 1463132160, while the sum is 80.

The spelling of 3196859887781 in words is "three trillion, one hundred ninety-six billion, eight hundred fifty-nine million, eight hundred eighty-seven thousand, seven hundred eighty-one".