156934381819 has 2 divisors, whose sum is σ = 156934381820. Its totient is φ = 156934381818.

The previous prime is 156934381817. The next prime is 156934381853. The reversal of 156934381819 is 918183439651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 156934381819 - 2¹ = 156934381817 is a prime.

It is a super-2 number, since 2×156934381819² (a number of 23 digits) contains 22 as substring.

Together with 156934381817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (156934381817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78467190909 + 78467190910.

It is an arithmetic number, because the mean of its divisors is an integer number (78467190910).

Almost surely, 2^156934381819 is an apocalyptic number.

156934381819 is a deficient number, since it is larger than the sum of its proper divisors (1).

156934381819 is an equidigital number, since it uses as much as digits as its factorization.

156934381819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5598720, while the sum is 58.

The spelling of 156934381819 in words is "one hundred fifty-six billion, nine hundred thirty-four million, three hundred eighty-one thousand, eight hundred nineteen".