156109541449 has 3 divisors (see below), whose sum is σ = 156109936557. Its totient is φ = 156109146342.

The previous prime is 156109541447. The next prime is 156109541503. The reversal of 156109541449 is 944145901651.

The square root of 156109541449 is 395107.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 944145901651 = 443 ⋅2131254857.

It is not a de Polignac number, because 156109541449 - 2¹ = 156109541447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156109541443) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 197554 + ... + 592660.

It is an arithmetic number, because the mean of its divisors is an integer number (52036645519).

Almost surely, 2^156109541449 is an apocalyptic number.

156109541449 is the 395107-th square number.

156109541449 is the 197554-th centered octagonal number.

It is an amenable number.

156109541449 is a deficient number, since it is larger than the sum of its proper divisors (395108).

156109541449 is an frugal number, since it uses more digits than its factorization.

156109541449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790214 (or 395107 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 49.

Multiplying 156109541449 by its sum of digits (49), we get a square (7649367531001 = 2765749²).

The spelling of 156109541449 in words is "one hundred fifty-six billion, one hundred nine million, five hundred forty-one thousand, four hundred forty-nine".