32720517157 has 2 divisors, whose sum is σ = 32720517158. Its totient is φ = 32720517156.

The previous prime is 32720517127. The next prime is 32720517239. The reversal of 32720517157 is 75171502723.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17185636836 + 15534880321 = 131094^2 + 124639^2 .

It is an emirp because it is prime and its reverse (75171502723) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32720517157 - 2⁷ = 32720517029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32720517127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16360258578 + 16360258579.

It is an arithmetic number, because the mean of its divisors is an integer number (16360258579).

Almost surely, 2^32720517157 is an apocalyptic number.

It is an amenable number.

32720517157 is a deficient number, since it is larger than the sum of its proper divisors (1).

32720517157 is an equidigital number, since it uses as much as digits as its factorization.

32720517157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102900, while the sum is 40.

The spelling of 32720517157 in words is "thirty-two billion, seven hundred twenty million, five hundred seventeen thousand, one hundred fifty-seven".