78637238543 has 2 divisors, whose sum is σ = 78637238544. Its totient is φ = 78637238542.

The previous prime is 78637238489. The next prime is 78637238587. The reversal of 78637238543 is 34583273687.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78637238543 - 2²⁰ = 78636189967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78637237543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39318619271 + 39318619272.

It is an arithmetic number, because the mean of its divisors is an integer number (39318619272).

Almost surely, 2^78637238543 is an apocalyptic number.

78637238543 is a deficient number, since it is larger than the sum of its proper divisors (1).

78637238543 is an equidigital number, since it uses as much as digits as its factorization.

78637238543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 56.

The spelling of 78637238543 in words is "seventy-eight billion, six hundred thirty-seven million, two hundred thirty-eight thousand, five hundred forty-three".