1961946773485 has 8 divisors (see below), whose sum is σ = 2354351539320. Its totient is φ = 1569547144704.

The previous prime is 1961946773483. The next prime is 1961946773537. The reversal of 1961946773485 is 5843776491691.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6477352324 + 1955469421161 = 80482^2 + 1398381^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1961946773485 - 2¹ = 1961946773483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961946773483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387052 + ... + 2018341.

It is an arithmetic number, because the mean of its divisors is an integer number (294293942415).

Almost surely, 2^{1961946773485} is an apocalyptic number.

It is an amenable number.

1961946773485 is a deficient number, since it is larger than the sum of its proper divisors (392404765835).

1961946773485 is a wasteful number, since it uses less digits than its factorization.

1961946773485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568527.

The product of its digits is 274337280, while the sum is 70.

The spelling of 1961946773485 in words is "one trillion, nine hundred sixty-one billion, nine hundred forty-six million, seven hundred seventy-three thousand, four hundred eighty-five".