858147839977 has 2 divisors, whose sum is σ = 858147839978. Its totient is φ = 858147839976.

The previous prime is 858147839957. The next prime is 858147840023. The reversal of 858147839977 is 779938741858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 815091174976 + 43056665001 = 902824^2 + 207501^2 .

It is a cyclic number.

It is not a de Polignac number, because 858147839977 - 2¹⁹ = 858147315689 is a prime.

It is not a weakly prime, because it can be changed into another prime (858147839957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429073919988 + 429073919989.

It is an arithmetic number, because the mean of its divisors is an integer number (429073919989).

Almost surely, 2^858147839977 is an apocalyptic number.

It is an amenable number.

858147839977 is a deficient number, since it is larger than the sum of its proper divisors (1).

858147839977 is an equidigital number, since it uses as much as digits as its factorization.

858147839977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 853493760, while the sum is 76.

The spelling of 858147839977 in words is "eight hundred fifty-eight billion, one hundred forty-seven million, eight hundred thirty-nine thousand, nine hundred seventy-seven".