2161641631151 has 4 divisors (see below), whose sum is σ = 2161794314400. Its totient is φ = 2161488947904.

The previous prime is 2161641631129. The next prime is 2161641631153. The reversal of 2161641631151 is 1511361461612.

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-2161641631151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161641631153) 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, 76320386 + ... + 76348703.

It is an arithmetic number, because the mean of its divisors is an integer number (540448578600).

Almost surely, 2^{2161641631151} is an apocalyptic number.

2161641631151 is a deficient number, since it is larger than the sum of its proper divisors (152683249).

2161641631151 is a wasteful number, since it uses less digits than its factorization.

2161641631151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152683248.

The product of its digits is 25920, while the sum is 38.

The spelling of 2161641631151 in words is "two trillion, one hundred sixty-one billion, six hundred forty-one million, six hundred thirty-one thousand, one hundred fifty-one".