158778877841 has 2 divisors, whose sum is σ = 158778877842. Its totient is φ = 158778877840.

The previous prime is 158778877811. The next prime is 158778877853. The reversal of 158778877841 is 148778877851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147683415616 + 11095462225 = 384296^2 + 105335^2 .

It is an emirp because it is prime and its reverse (148778877851) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158778877841 is a prime.

It is not a weakly prime, because it can be changed into another prime (158778877801) 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, 79389438920 + 79389438921.

It is an arithmetic number, because the mean of its divisors is an integer number (79389438921).

Almost surely, 2^158778877841 is an apocalyptic number.

It is an amenable number.

158778877841 is a deficient number, since it is larger than the sum of its proper divisors (1).

158778877841 is an equidigital number, since it uses as much as digits as its factorization.

158778877841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 196689920, while the sum is 71.

The spelling of 158778877841 in words is "one hundred fifty-eight billion, seven hundred seventy-eight million, eight hundred seventy-seven thousand, eight hundred forty-one".