78432167425757 has 2 divisors, whose sum is σ = 78432167425758. Its totient is φ = 78432167425756.

The previous prime is 78432167425691. The next prime is 78432167425841. The reversal of 78432167425757 is 75752476123487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74611260603961 + 3820906821796 = 8637781^2 + 1954714^2 .

It is an emirp because it is prime and its reverse (75752476123487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78432167425757 - 2⁸ = 78432167425501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78432167421757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39216083712878 + 39216083712879.

It is an arithmetic number, because the mean of its divisors is an integer number (39216083712879).

Almost surely, 2^{78432167425757} is an apocalyptic number.

It is an amenable number.

78432167425757 is a deficient number, since it is larger than the sum of its proper divisors (1).

78432167425757 is an equidigital number, since it uses as much as digits as its factorization.

78432167425757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 553190400, while the sum is 68.

The spelling of 78432167425757 in words is "seventy-eight trillion, four hundred thirty-two billion, one hundred sixty-seven million, four hundred twenty-five thousand, seven hundred fifty-seven".