3907661851591 has 2 divisors, whose sum is σ = 3907661851592. Its totient is φ = 3907661851590.

The previous prime is 3907661851439. The next prime is 3907661851631. The reversal of 3907661851591 is 1951581667093.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1951581667093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3907661851591 - 2¹¹ = 3907661849543 is a prime.

It is a super-2 number, since 2×3907661851591² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3907661851091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1953830925795 + 1953830925796.

It is an arithmetic number, because the mean of its divisors is an integer number (1953830925796).

Almost surely, 2^{3907661851591} is an apocalyptic number.

3907661851591 is a deficient number, since it is larger than the sum of its proper divisors (1).

3907661851591 is an equidigital number, since it uses as much as digits as its factorization.

3907661851591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12247200, while the sum is 61.

The spelling of 3907661851591 in words is "three trillion, nine hundred seven billion, six hundred sixty-one million, eight hundred fifty-one thousand, five hundred ninety-one".