78532371601 has 2 divisors, whose sum is σ = 78532371602. Its totient is φ = 78532371600.

The previous prime is 78532371563. The next prime is 78532371613. The reversal of 78532371601 is 10617323587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60025490001 + 18506881600 = 245001^2 + 136040^2 .

It is a cyclic number.

It is not a de Polignac number, because 78532371601 - 2⁷ = 78532371473 is a prime.

It is not a weakly prime, because it can be changed into another prime (78592371601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39266185800 + 39266185801.

It is an arithmetic number, because the mean of its divisors is an integer number (39266185801).

Almost surely, 2^78532371601 is an apocalyptic number.

It is an amenable number.

78532371601 is a deficient number, since it is larger than the sum of its proper divisors (1).

78532371601 is an equidigital number, since it uses as much as digits as its factorization.

78532371601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 78532371601 in words is "seventy-eight billion, five hundred thirty-two million, three hundred seventy-one thousand, six hundred one".