156835000921 has 2 divisors, whose sum is σ = 156835000922. Its totient is φ = 156835000920.

The previous prime is 156835000823. The next prime is 156835000937. The reversal of 156835000921 is 129000538651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145743751696 + 11091249225 = 381764^2 + 105315^2 .

It is an emirp because it is prime and its reverse (129000538651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 156835000921 - 2¹⁵ = 156834968153 is a prime.

It is not a weakly prime, because it can be changed into another prime (156835000961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78417500460 + 78417500461.

It is an arithmetic number, because the mean of its divisors is an integer number (78417500461).

Almost surely, 2^156835000921 is an apocalyptic number.

It is an amenable number.

156835000921 is a deficient number, since it is larger than the sum of its proper divisors (1).

156835000921 is an equidigital number, since it uses as much as digits as its factorization.

156835000921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 156835000921 in words is "one hundred fifty-six billion, eight hundred thirty-five million, nine hundred twenty-one", and thus it is an aban number.