1961375139632 has 40 divisors (see below), whose sum is σ = 3965591471616. Its totient is φ = 938001052736.

The previous prime is 1961375139631. The next prime is 1961375139637. The reversal of 1961375139632 is 2369315731691.

It is not an unprimeable number, because it can be changed into a prime (1961375139631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7685993 + ... + 7937079.

Almost surely, 2^{1961375139632} is an apocalyptic number.

It is an amenable number.

1961375139632 is an abundant number, since it is smaller than the sum of its proper divisors (2004216331984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1961375139632 is a wasteful number, since it uses less digits than its factorization.

1961375139632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272345 (or 272339 counting only the distinct ones).

The product of its digits is 5511240, while the sum is 56.

The spelling of 1961375139632 in words is "one trillion, nine hundred sixty-one billion, three hundred seventy-five million, one hundred thirty-nine thousand, six hundred thirty-two".