157728543979 has 2 divisors, whose sum is σ = 157728543980. Its totient is φ = 157728543978.

The previous prime is 157728543923. The next prime is 157728544021. The reversal of 157728543979 is 979345827751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157728543979 - 2¹³ = 157728535787 is a prime.

It is not a weakly prime, because it can be changed into another prime (157728543919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78864271989 + 78864271990.

It is an arithmetic number, because the mean of its divisors is an integer number (78864271990).

Almost surely, 2^157728543979 is an apocalyptic number.

157728543979 is a deficient number, since it is larger than the sum of its proper divisors (1).

157728543979 is an equidigital number, since it uses as much as digits as its factorization.

157728543979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 133358400, while the sum is 67.

The spelling of 157728543979 in words is "one hundred fifty-seven billion, seven hundred twenty-eight million, five hundred forty-three thousand, nine hundred seventy-nine".