1961379286597 has 4 divisors (see below), whose sum is σ = 1980798883596. Its totient is φ = 1941959689600.

The previous prime is 1961379286571. The next prime is 1961379286609. The reversal of 1961379286597 is 7956829731691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1924681754241 + 36697532356 = 1387329^2 + 191566^2 .

It is a cyclic number.

It is not a de Polignac number, because 1961379286597 - 2¹⁹ = 1961378762309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961379286897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9709798348 + ... + 9709798549.

It is an arithmetic number, because the mean of its divisors is an integer number (495199720899).

Almost surely, 2^{1961379286597} is an apocalyptic number.

It is an amenable number.

1961379286597 is a deficient number, since it is larger than the sum of its proper divisors (19419596999).

1961379286597 is a wasteful number, since it uses less digits than its factorization.

1961379286597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19419596998.

The product of its digits is 308629440, while the sum is 73.

The spelling of 1961379286597 in words is "one trillion, nine hundred sixty-one billion, three hundred seventy-nine million, two hundred eighty-six thousand, five hundred ninety-seven".