156239809811 has 4 divisors (see below), whose sum is σ = 156254767152. Its totient is φ = 156224852472.

The previous prime is 156239809787. The next prime is 156239809871. The reversal of 156239809811 is 118908932651.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156239809811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156239809871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7462991 + ... + 7483896.

It is an arithmetic number, because the mean of its divisors is an integer number (39063691788).

Almost surely, 2^156239809811 is an apocalyptic number.

156239809811 is a deficient number, since it is larger than the sum of its proper divisors (14957341).

156239809811 is a wasteful number, since it uses less digits than its factorization.

156239809811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14957340.

The product of its (nonzero) digits is 933120, while the sum is 53.

The spelling of 156239809811 in words is "one hundred fifty-six billion, two hundred thirty-nine million, eight hundred nine thousand, eight hundred eleven".