156601421441 has 2 divisors, whose sum is σ = 156601421442. Its totient is φ = 156601421440.

The previous prime is 156601421429. The next prime is 156601421443. The reversal of 156601421441 is 144124106651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148786861441 + 7814560000 = 385729^2 + 88400^2 .

It is a cyclic number.

It is not a de Polignac number, because 156601421441 - 2²⁶ = 156534312577 is a prime.

Together with 156601421443, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156601421443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78300710720 + 78300710721.

It is an arithmetic number, because the mean of its divisors is an integer number (78300710721).

Almost surely, 2^156601421441 is an apocalyptic number.

It is an amenable number.

156601421441 is a deficient number, since it is larger than the sum of its proper divisors (1).

156601421441 is an equidigital number, since it uses as much as digits as its factorization.

156601421441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 156601421441 in words is "one hundred fifty-six billion, six hundred one million, four hundred twenty-one thousand, four hundred forty-one".