156428927909 has 2 divisors, whose sum is σ = 156428927910. Its totient is φ = 156428927908.

The previous prime is 156428927903. The next prime is 156428927917. The reversal of 156428927909 is 909729824651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156323762884 + 105165025 = 395378^2 + 10255^2 .

It is a cyclic number.

It is not a de Polignac number, because 156428927909 - 2³⁶ = 87709451173 is a prime.

It is a super-2 number, since 2×156428927909² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156428927903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78214463954 + 78214463955.

It is an arithmetic number, because the mean of its divisors is an integer number (78214463955).

Almost surely, 2^156428927909 is an apocalyptic number.

It is an amenable number.

156428927909 is a deficient number, since it is larger than the sum of its proper divisors (1).

156428927909 is an equidigital number, since it uses as much as digits as its factorization.

156428927909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19595520, while the sum is 62.

The spelling of 156428927909 in words is "one hundred fifty-six billion, four hundred twenty-eight million, nine hundred twenty-seven thousand, nine hundred nine".