2156202061511 has 8 divisors (see below), whose sum is σ = 2283139489680. Its totient is φ = 2029275968128.

The previous prime is 2156202061487. The next prime is 2156202061547. The reversal of 2156202061511 is 1151602026512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2156202061511 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 (2156202063511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2440481 + ... + 3204426.

It is an arithmetic number, because the mean of its divisors is an integer number (285392436210).

Almost surely, 2^{2156202061511} is an apocalyptic number.

2156202061511 is a deficient number, since it is larger than the sum of its proper divisors (126937428169).

2156202061511 is a wasteful number, since it uses less digits than its factorization.

2156202061511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5667393.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 2156202061511 in words is "two trillion, one hundred fifty-six billion, two hundred two million, sixty-one thousand, five hundred eleven".