101986425161 has 4 divisors (see below), whose sum is σ = 101987380500. Its totient is φ = 101985469824.

The previous prime is 101986425127. The next prime is 101986425179. The reversal of 101986425161 is 161524689101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2660599561 + 99325825600 = 51581^2 + 315160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101986425161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101986425461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293996 + ... + 538893.

It is an arithmetic number, because the mean of its divisors is an integer number (25496845125).

Almost surely, 2^101986425161 is an apocalyptic number.

It is an amenable number.

101986425161 is a deficient number, since it is larger than the sum of its proper divisors (955339).

101986425161 is an equidigital number, since it uses as much as digits as its factorization.

101986425161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955338.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 101986425161 in words is "one hundred one billion, nine hundred eighty-six million, four hundred twenty-five thousand, one hundred sixty-one".