1961385713597 has 2 divisors, whose sum is σ = 1961385713598. Its totient is φ = 1961385713596.

The previous prime is 1961385713591. The next prime is 1961385713603. The reversal of 1961385713597 is 7953175831691.

It is a balanced prime because it is at equal distance from previous prime (1961385713591) and next prime (1961385713603).

It can be written as a sum of positive squares in only one way, i.e., 1861789296676 + 99596416921 = 1364474^2 + 315589^2 .

It is an emirp because it is prime and its reverse (7953175831691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1961385713597 - 2⁶ = 1961385713533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1961385713591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980692856798 + 980692856799.

It is an arithmetic number, because the mean of its divisors is an integer number (980692856799).

Almost surely, 2^{1961385713597} is an apocalyptic number.

It is an amenable number.

1961385713597 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961385713597 is an equidigital number, since it uses as much as digits as its factorization.

1961385713597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42865200, while the sum is 65.

The spelling of 1961385713597 in words is "one trillion, nine hundred sixty-one billion, three hundred eighty-five million, seven hundred thirteen thousand, five hundred ninety-seven".