3971619261694 has 16 divisors (see below), whose sum is σ = 6808586428800. Its totient is φ = 1702098474264.

The previous prime is 3971619261689. The next prime is 3971619261719. The reversal of 3971619261694 is 4961629161793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961264 + ... + 2977795.

It is an arithmetic number, because the mean of its divisors is an integer number (425536651800).

Almost surely, 2^{3971619261694} is an apocalyptic number.

3971619261694 is a deficient number, since it is larger than the sum of its proper divisors (2836967167106).

3971619261694 is a wasteful number, since it uses less digits than its factorization.

3971619261694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4011087.

The product of its digits is 26453952, while the sum is 64.

Subtracting 3971619261694 from its reverse (4961629161793), we obtain a palindrome (990009900099).

The spelling of 3971619261694 in words is "three trillion, nine hundred seventy-one billion, six hundred nineteen million, two hundred sixty-one thousand, six hundred ninety-four".