2157246763843 has 2 divisors, whose sum is σ = 2157246763844. Its totient is φ = 2157246763842.

The previous prime is 2157246763751. The next prime is 2157246763891. The reversal of 2157246763843 is 3483676427512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2157246763843 is a prime.

It is a super-2 number, since 2×2157246763843² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2157246761843) 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 as a sum of consecutive naturals, namely, 1078623381921 + 1078623381922.

It is an arithmetic number, because the mean of its divisors is an integer number (1078623381922).

Almost surely, 2^{2157246763843} is an apocalyptic number.

2157246763843 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157246763843 is an equidigital number, since it uses as much as digits as its factorization.

2157246763843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40642560, while the sum is 58.

The spelling of 2157246763843 in words is "two trillion, one hundred fifty-seven billion, two hundred forty-six million, seven hundred sixty-three thousand, eight hundred forty-three".