3121478033748 has 12 divisors (see below), whose sum is σ = 7283448745440. Its totient is φ = 1040492677912.

The previous prime is 3121478033743. The next prime is 3121478033749. The reversal of 3121478033748 is 8473308741213.

It is a happy number.

3121478033748 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 3121478033748.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121478033743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130061584728 + ... + 130061584751.

It is an arithmetic number, because the mean of its divisors is an integer number (606954062120).

Almost surely, 2^{3121478033748} is an apocalyptic number.

It is an amenable number.

3121478033748 is an abundant number, since it is smaller than the sum of its proper divisors (4161970711692).

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

3121478033748 is a wasteful number, since it uses less digits than its factorization.

3121478033748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260123169486 (or 260123169484 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 51.

The spelling of 3121478033748 in words is "three trillion, one hundred twenty-one billion, four hundred seventy-eight million, thirty-three thousand, seven hundred forty-eight".