156039494689 has 4 divisors (see below), whose sum is σ = 168042532756. Its totient is φ = 144036456624.

The previous prime is 156039494599. The next prime is 156039494777. The reversal of 156039494689 is 986494930651.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 986494930651 = 73 ⋅13513629187.

It can be written as a sum of positive squares in 2 ways, for example, as 8512830225 + 147526664464 = 92265^2 + 384092^2 .

It is a cyclic number.

It is not a de Polignac number, because 156039494689 - 2²⁵ = 156005940257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 156039494689.

It is not an unprimeable number, because it can be changed into a prime (156039494789) 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 in 3 ways as a sum of consecutive naturals, for example, 6001519014 + ... + 6001519039.

It is an arithmetic number, because the mean of its divisors is an integer number (42010633189).

Almost surely, 2^156039494689 is an apocalyptic number.

It is an amenable number.

156039494689 is a deficient number, since it is larger than the sum of its proper divisors (12003038067).

156039494689 is a wasteful number, since it uses less digits than its factorization.

156039494689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12003038066.

The product of its (nonzero) digits is 50388480, while the sum is 64.

The spelling of 156039494689 in words is "one hundred fifty-six billion, thirty-nine million, four hundred ninety-four thousand, six hundred eighty-nine".