31850141949649 has 3 divisors (see below), whose sum is σ = 31850147593243. Its totient is φ = 31850136306056.

The previous prime is 31850141949641. The next prime is 31850141949673. The reversal of 31850141949649 is 94694914105813.

The square root of 31850141949649 is 5643593.

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., 27480503574225 + 4369638375424 = 5242185^2 + 2090368^2 .

It is not a de Polignac number, because 31850141949649 - 2³ = 31850141949641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31850141949641) 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, 2821797 + ... + 8465389.

Almost surely, 2^{31850141949649} is an apocalyptic number.

31850141949649 is the 5643593-rd square number.

31850141949649 is the 2821797-th centered octagonal number.

It is an amenable number.

31850141949649 is a deficient number, since it is larger than the sum of its proper divisors (5643594).

31850141949649 is an frugal number, since it uses more digits than its factorization.

31850141949649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11287186 (or 5643593 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 64.

The spelling of 31850141949649 in words is "thirty-one trillion, eight hundred fifty billion, one hundred forty-one million, nine hundred forty-nine thousand, six hundred forty-nine".