49371506809 has 3 divisors (see below), whose sum is σ = 49371729007. Its totient is φ = 49371284612.

The previous prime is 49371506753. The next prime is 49371506827. The reversal of 49371506809 is 90860517394.

It is a happy number.

The square root of 49371506809 is 222197.

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.

It can be written as a sum of positive squares in only one way, i.e., 44992773225 + 4378733584 = 212115^2 + 66172^2 .

It is not a de Polignac number, because 49371506809 - 2¹⁷ = 49371375737 is a prime.

It is a super-2 number, since 2×49371506809² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49371503809) 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, 111099 + ... + 333295.

Almost surely, 2^49371506809 is an apocalyptic number.

49371506809 is the 222197-th square number.

49371506809 is the 111099-th centered octagonal number.

It is an amenable number.

49371506809 is a deficient number, since it is larger than the sum of its proper divisors (222198).

49371506809 is an frugal number, since it uses more digits than its factorization.

49371506809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444394 (or 222197 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 49371506809 in words is "forty-nine billion, three hundred seventy-one million, five hundred six thousand, eight hundred nine".