156581474941 has 2 divisors, whose sum is σ = 156581474942. Its totient is φ = 156581474940.

The previous prime is 156581474927. The next prime is 156581474989. The reversal of 156581474941 is 149474185651.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146865232900 + 9716242041 = 383230^2 + 98571^2 .

It is a cyclic number.

It is not a de Polignac number, because 156581474941 - 2¹¹ = 156581472893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156581472941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78290737470 + 78290737471.

It is an arithmetic number, because the mean of its divisors is an integer number (78290737471).

Almost surely, 2^156581474941 is an apocalyptic number.

It is an amenable number.

156581474941 is a deficient number, since it is larger than the sum of its proper divisors (1).

156581474941 is an equidigital number, since it uses as much as digits as its factorization.

156581474941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4838400, while the sum is 55.

The spelling of 156581474941 in words is "one hundred fifty-six billion, five hundred eighty-one million, four hundred seventy-four thousand, nine hundred forty-one".