31149779049 has 9 divisors (see below), whose sum is σ = 44994890109. Its totient is φ = 20766166380.

The previous prime is 31149779029. The next prime is 31149779051. The reversal of 31149779049 is 94097794113.

The square root of 31149779049 is 176493.

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

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 31149779049 - 2¹⁵ = 31149746281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31149778986 and 31149779004.

It is not an unprimeable number, because it can be changed into a prime (31149779029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 500064 + ... + 558894.

Almost surely, 2^31149779049 is an apocalyptic number.

31149779049 is the 176493-rd square number.

31149779049 is the 88247-th centered octagonal number.

It is an amenable number.

31149779049 is a deficient number, since it is larger than the sum of its proper divisors (13845111060).

31149779049 is an frugal number, since it uses more digits than its factorization.

31149779049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117668 (or 58834 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The spelling of 31149779049 in words is "thirty-one billion, one hundred forty-nine million, seven hundred seventy-nine thousand, forty-nine".