78877850235937 has 2 divisors, whose sum is σ = 78877850235938. Its totient is φ = 78877850235936.

The previous prime is 78877850235923. The next prime is 78877850235953. The reversal of 78877850235937 is 73953205877887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72936911976721 + 5940938259216 = 8540311^2 + 2437404^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78877850235937 is a prime.

It is not a weakly prime, because it can be changed into another prime (78877850535937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39438925117968 + 39438925117969.

It is an arithmetic number, because the mean of its divisors is an integer number (39438925117969).

Almost surely, 2^{78877850235937} is an apocalyptic number.

It is an amenable number.

78877850235937 is a deficient number, since it is larger than the sum of its proper divisors (1).

78877850235937 is an equidigital number, since it uses as much as digits as its factorization.

78877850235937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4978713600, while the sum is 79.

The spelling of 78877850235937 in words is "seventy-eight trillion, eight hundred seventy-seven billion, eight hundred fifty million, two hundred thirty-five thousand, nine hundred thirty-seven".