3121348644 has 36 divisors (see below), whose sum is σ = 7971425644. Its totient is φ = 1029722112.

The previous prime is 3121348639. The next prime is 3121348651. The reversal of 3121348644 is 4468431213.

3121348644 is a `hidden beast` number, since 3 + 1 + 2 + 1 + 3 + 4 + 8 + 644 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1286083044 + 1835265600 = 35862^2 + 42840^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3121348599 and 3121348608.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 443437 + ... + 450420.

Almost surely, 2^3121348644 is an apocalyptic number.

It is an amenable number.

3121348644 is an abundant number, since it is smaller than the sum of its proper divisors (4850077000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3121348644 is a wasteful number, since it uses less digits than its factorization.

3121348644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893964 (or 893959 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 3121348644 is about 55869.0311711238. The cubic root of 3121348644 is about 1461.4392269344.

Adding to 3121348644 its reverse (4468431213), we get a palindrome (7589779857).

The spelling of 3121348644 in words is "three billion, one hundred twenty-one million, three hundred forty-eight thousand, six hundred forty-four".