161611101649997 has 8 divisors (see below), whose sum is σ = 170119365952800. Its totient is φ = 153103079031984.

The previous prime is 161611101649993. The next prime is 161611101650083. The reversal of 161611101649997 is 799946101116161.

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 161611101649997 - 2² = 161611101649993 is a prime.

It is a super-2 number, since 2×161611101649997² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161611101649993) 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, 59047823 + ... + 61724124.

It is an arithmetic number, because the mean of its divisors is an integer number (21264920744100).

Almost surely, 2^{161611101649997} is an apocalyptic number.

It is an amenable number.

161611101649997 is a deficient number, since it is larger than the sum of its proper divisors (8508264302803).

161611101649997 is a wasteful number, since it uses less digits than its factorization.

161611101649997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120842395.

The product of its (nonzero) digits is 4408992, while the sum is 62.

The spelling of 161611101649997 in words is "one hundred sixty-one trillion, six hundred eleven billion, one hundred one million, six hundred forty-nine thousand, nine hundred ninety-seven".