235816512096721 has 2 divisors, whose sum is σ = 235816512096722. Its totient is φ = 235816512096720.

The previous prime is 235816512096713. The next prime is 235816512096793. The reversal of 235816512096721 is 127690215618532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219457884720321 + 16358627376400 = 14814111^2 + 4044580^2 .

It is a cyclic number.

It is not a de Polignac number, because 235816512096721 - 2³ = 235816512096713 is a prime.

It is not a weakly prime, because it can be changed into another prime (235816512016721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117908256048360 + 117908256048361.

It is an arithmetic number, because the mean of its divisors is an integer number (117908256048361).

Almost surely, 2^{235816512096721} is an apocalyptic number.

It is an amenable number.

235816512096721 is a deficient number, since it is larger than the sum of its proper divisors (1).

235816512096721 is an equidigital number, since it uses as much as digits as its factorization.

235816512096721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10886400, while the sum is 58.

The spelling of 235816512096721 in words is "two hundred thirty-five trillion, eight hundred sixteen billion, five hundred twelve million, ninety-six thousand, seven hundred twenty-one".