2161659137 has 8 divisors (see below), whose sum is σ = 2390478240. Its totient is φ = 1938224160.

The previous prime is 2161659121. The next prime is 2161659167. The reversal of 2161659137 is 7319561612.

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 2161659137 - 2⁴ = 2161659121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2161659094 and 2161659103.

It is not an unprimeable number, because it can be changed into a prime (2161659107) 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, 1345187 + ... + 1346792.

It is an arithmetic number, because the mean of its divisors is an integer number (298809780).

Almost surely, 2^2161659137 is an apocalyptic number.

It is an amenable number.

2161659137 is a deficient number, since it is larger than the sum of its proper divisors (228819103).

2161659137 is a wasteful number, since it uses less digits than its factorization.

2161659137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2692063.

The product of its digits is 68040, while the sum is 41.

The square root of 2161659137 is about 46493.6462003143. The cubic root of 2161659137 is about 1292.9917017492.

The spelling of 2161659137 in words is "two billion, one hundred sixty-one million, six hundred fifty-nine thousand, one hundred thirty-seven".