2157641136543 has 4 divisors (see below), whose sum is σ = 2876854848728. Its totient is φ = 1438427424360.

The previous prime is 2157641136517. The next prime is 2157641136601. The reversal of 2157641136543 is 3456311467512.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2157641136543 - 2³⁷ = 2020202183071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2157641136492 and 2157641136501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157641136743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359606856088 + ... + 359606856093.

It is an arithmetic number, because the mean of its divisors is an integer number (719213712182).

Almost surely, 2^{2157641136543} is an apocalyptic number.

2157641136543 is a deficient number, since it is larger than the sum of its proper divisors (719213712185).

2157641136543 is an equidigital number, since it uses as much as digits as its factorization.

2157641136543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719213712184.

The product of its digits is 1814400, while the sum is 48.

The spelling of 2157641136543 in words is "two trillion, one hundred fifty-seven billion, six hundred forty-one million, one hundred thirty-six thousand, five hundred forty-three".