10161961921 has 8 divisors (see below), whose sum is σ = 10177677440. Its totient is φ = 10146261312.

The previous prime is 10161961907. The next prime is 10161961933. The reversal of 10161961921 is 12916916101.

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 10161961921 - 2⁷ = 10161961793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10161961721) 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 7 ways as a sum of consecutive naturals, for example, 2295316 + ... + 2299738.

It is an arithmetic number, because the mean of its divisors is an integer number (1272209680).

Almost surely, 2^10161961921 is an apocalyptic number.

It is an amenable number.

10161961921 is a deficient number, since it is larger than the sum of its proper divisors (15715519).

10161961921 is a wasteful number, since it uses less digits than its factorization.

10161961921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7455.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 10161961921 in words is "ten billion, one hundred sixty-one million, nine hundred sixty-one thousand, nine hundred twenty-one".