161611101650039 has 4 divisors (see below), whose sum is σ = 161611207794960. Its totient is φ = 161610995505120.

The previous prime is 161611101649993. The next prime is 161611101650083. The reversal of 161611101650039 is 930056101116161.

161611101650039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161611101650039 is a prime.

It is a super-2 number, since 2×161611101650039² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161611101649978 and 161611101650005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161611701650039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50754899 + ... + 53844980.

It is an arithmetic number, because the mean of its divisors is an integer number (40402801948740).

Almost surely, 2^{161611101650039} is an apocalyptic number.

161611101650039 is a deficient number, since it is larger than the sum of its proper divisors (106144921).

161611101650039 is a wasteful number, since it uses less digits than its factorization.

161611101650039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106144920.

The product of its (nonzero) digits is 29160, while the sum is 41.

The spelling of 161611101650039 in words is "one hundred sixty-one trillion, six hundred eleven billion, one hundred one million, six hundred fifty thousand, thirty-nine".