842157263977 has 2 divisors, whose sum is σ = 842157263978. Its totient is φ = 842157263976.

The previous prime is 842157263957. The next prime is 842157264019. The reversal of 842157263977 is 779362751248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 563184207936 + 278973056041 = 750456^2 + 528179^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-842157263977 is a prime.

It is not a weakly prime, because it can be changed into another prime (842157263917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421078631988 + 421078631989.

It is an arithmetic number, because the mean of its divisors is an integer number (421078631989).

Almost surely, 2^842157263977 is an apocalyptic number.

It is an amenable number.

842157263977 is a deficient number, since it is larger than the sum of its proper divisors (1).

842157263977 is an equidigital number, since it uses as much as digits as its factorization.

842157263977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35562240, while the sum is 61.

The spelling of 842157263977 in words is "eight hundred forty-two billion, one hundred fifty-seven million, two hundred sixty-three thousand, nine hundred seventy-seven".