2161306611541 has 8 divisors (see below), whose sum is σ = 2694616035264. Its totient is φ = 1684135021920.

The previous prime is 2161306611533. The next prime is 2161306611551. The reversal of 2161306611541 is 1451166031612.

It is a happy number.

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 2161306611541 - 2³ = 2161306611533 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 2161306611541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161306611521) 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, 14034458440 + ... + 14034458593.

It is an arithmetic number, because the mean of its divisors is an integer number (336827004408).

Almost surely, 2^{2161306611541} is an apocalyptic number.

It is an amenable number.

2161306611541 is a deficient number, since it is larger than the sum of its proper divisors (533309423723).

2161306611541 is a wasteful number, since it uses less digits than its factorization.

2161306611541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28068917051.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 2161306611541 in words is "two trillion, one hundred sixty-one billion, three hundred six million, six hundred eleven thousand, five hundred forty-one".