7961964240437 has 2 divisors, whose sum is σ = 7961964240438. Its totient is φ = 7961964240436.

The previous prime is 7961964240427. The next prime is 7961964240449. The reversal of 7961964240437 is 7340424691697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7954171058596 + 7793181841 = 2820314^2 + 88279^2 .

It is a cyclic number.

It is not a de Polignac number, because 7961964240437 - 2³⁴ = 7944784371253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7961964240437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7961964240427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3980982120218 + 3980982120219.

It is an arithmetic number, because the mean of its divisors is an integer number (3980982120219).

Almost surely, 2^{7961964240437} is an apocalyptic number.

It is an amenable number.

7961964240437 is a deficient number, since it is larger than the sum of its proper divisors (1).

7961964240437 is an equidigital number, since it uses as much as digits as its factorization.

7961964240437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54867456, while the sum is 62.

The spelling of 7961964240437 in words is "seven trillion, nine hundred sixty-one billion, nine hundred sixty-four million, two hundred forty thousand, four hundred thirty-seven".