18100065961 has 8 divisors (see below), whose sum is σ = 18639849600. Its totient is φ = 17568049200.

The previous prime is 18100065941. The next prime is 18100065967. The reversal of 18100065961 is 16956000181.

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 18100065961 - 2¹³ = 18100057769 is a prime.

It is a super-2 number, since 2×18100065961² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18100065961.

It is not an unprimeable number, because it can be changed into a prime (18100065967) 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, 1936990 + ... + 1946311.

It is an arithmetic number, because the mean of its divisors is an integer number (2329981200).

Almost surely, 2^18100065961 is an apocalyptic number.

It is an amenable number.

18100065961 is a deficient number, since it is larger than the sum of its proper divisors (539783639).

18100065961 is an equidigital number, since it uses as much as digits as its factorization.

18100065961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3883439.

The product of its (nonzero) digits is 12960, while the sum is 37.

The spelling of 18100065961 in words is "eighteen billion, one hundred million, sixty-five thousand, nine hundred sixty-one".