2136161657 has 8 divisors (see below), whose sum is σ = 2449180032. Its totient is φ = 1825106400.

The previous prime is 2136161653. The next prime is 2136161681. The reversal of 2136161657 is 7561616312.

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 2136161657 - 2² = 2136161653 is a prime.

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 2136161657.

It is not an unprimeable number, because it can be changed into a prime (2136161653) 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, 488444 + ... + 492797.

It is an arithmetic number, because the mean of its divisors is an integer number (306147504).

Almost surely, 2^2136161657 is an apocalyptic number.

It is an amenable number.

2136161657 is a deficient number, since it is larger than the sum of its proper divisors (313018375).

2136161657 is an equidigital number, since it uses as much as digits as its factorization.

2136161657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981559.

The product of its digits is 45360, while the sum is 38.

The square root of 2136161657 is about 46218.6288957169. The cubic root of 2136161657 is about 1287.8878275140.

Adding to 2136161657 its reverse (7561616312), we get a palindrome (9697777969).

The spelling of 2136161657 in words is "two billion, one hundred thirty-six million, one hundred sixty-one thousand, six hundred fifty-seven".