2156651032543 has 16 divisors (see below), whose sum is σ = 2474407648000. Its totient is φ = 1841324498496.

The previous prime is 2156651032493. The next prime is 2156651032559. The reversal of 2156651032543 is 3452301566512.

It is a de Polignac number, because none of the positive numbers 2^k-2156651032543 is a prime.

It is a super-2 number, since 2×2156651032543² (a number of 25 digits) contains 22 as substring.

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 2156651032543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156651032583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1236571 + ... + 2417107.

It is an arithmetic number, because the mean of its divisors is an integer number (154650478000).

Almost surely, 2^{2156651032543} is an apocalyptic number.

2156651032543 is a deficient number, since it is larger than the sum of its proper divisors (317756615457).

2156651032543 is a wasteful number, since it uses less digits than its factorization.

2156651032543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181566.

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 2156651032543 in words is "two trillion, one hundred fifty-six billion, six hundred fifty-one million, thirty-two thousand, five hundred forty-three".