1896928561961 has 8 divisors (see below), whose sum is σ = 1904015414784. Its totient is φ = 1889842350240.

The previous prime is 1896928561951. The next prime is 1896928562069. The reversal of 1896928561961 is 1691658296981.

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 1896928561961 - 2¹⁰ = 1896928560937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1896928561951) 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, 6245360 + ... + 6542046.

It is an arithmetic number, because the mean of its divisors is an integer number (238001926848).

Almost surely, 2^{1896928561961} is an apocalyptic number.

It is an amenable number.

1896928561961 is a deficient number, since it is larger than the sum of its proper divisors (7086852823).

1896928561961 is a wasteful number, since it uses less digits than its factorization.

1896928561961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320551.

The product of its digits is 100776960, while the sum is 71.

The spelling of 1896928561961 in words is "one trillion, eight hundred ninety-six billion, nine hundred twenty-eight million, five hundred sixty-one thousand, nine hundred sixty-one".