49491121156 has 27 divisors (see below), whose sum is σ = 88806144063. Its totient is φ = 24133111680.

The previous prime is 49491121129. The next prime is 49491121181. The reversal of 49491121156 is 65112119494.

It is a happy number.

The square root of 49491121156 is 222466.

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

It can be written as a sum of positive squares in 4 ways, for example, as 554602500 + 48936518656 = 23550^2 + 221216^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18240856 + ... + 18243568.

Almost surely, 2^49491121156 is an apocalyptic number.

49491121156 is the 222466-th square number.

It is an amenable number.

49491121156 is a deficient number, since it is larger than the sum of its proper divisors (39315022907).

49491121156 is an frugal number, since it uses more digits than its factorization.

49491121156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5512 (or 2756 counting only the distinct ones).

The product of its digits is 77760, while the sum is 43.

The spelling of 49491121156 in words is "forty-nine billion, four hundred ninety-one million, one hundred twenty-one thousand, one hundred fifty-six".