2156017503643 has 2 divisors, whose sum is σ = 2156017503644. Its totient is φ = 2156017503642.

The previous prime is 2156017503637. The next prime is 2156017503659. The reversal of 2156017503643 is 3463057106512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2156017503643 - 2¹³ = 2156017495451 is a prime.

It is a super-2 number, since 2×2156017503643² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2156017503643.

It is not a weakly prime, because it can be changed into another prime (2156017503613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078008751821 + 1078008751822.

It is an arithmetic number, because the mean of its divisors is an integer number (1078008751822).

Almost surely, 2^{2156017503643} is an apocalyptic number.

2156017503643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156017503643 is an equidigital number, since it uses as much as digits as its factorization.

2156017503643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 2156017503643 in words is "two trillion, one hundred fifty-six billion, seventeen million, five hundred three thousand, six hundred forty-three".