156000206550509 has 4 divisors (see below), whose sum is σ = 156001320095040. Its totient is φ = 155999093005980.

The previous prime is 156000206550413. The next prime is 156000206550563. The reversal of 156000206550509 is 905055602000651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156000206550509 is a prime.

It is a super-2 number, since 2×156000206550509² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 156000206550509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156000206553509) 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, 556562099 + ... + 556842320.

It is an arithmetic number, because the mean of its divisors is an integer number (39000330023760).

Almost surely, 2^{156000206550509} is an apocalyptic number.

It is an amenable number.

156000206550509 is a deficient number, since it is larger than the sum of its proper divisors (1113544531).

156000206550509 is a wasteful number, since it uses less digits than its factorization.

156000206550509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113544530.

The product of its (nonzero) digits is 405000, while the sum is 44.

The spelling of 156000206550509 in words is "one hundred fifty-six trillion, two hundred six million, five hundred fifty thousand, five hundred nine".