3121415145440 has 48 divisors (see below), whose sum is σ = 7439602999248. Its totient is φ = 1237516793856.

The previous prime is 3121415145383. The next prime is 3121415145449. The reversal of 3121415145440 is 445415141213.

It is a self number, because there is not a number n which added to its sum of digits gives 3121415145440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121415145449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86304242 + ... + 86340401.

It is an arithmetic number, because the mean of its divisors is an integer number (154991729151).

Almost surely, 2^{3121415145440} is an apocalyptic number.

It is an amenable number.

3121415145440 is an abundant number, since it is smaller than the sum of its proper divisors (4318187853808).

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

3121415145440 is a wasteful number, since it uses less digits than its factorization.

3121415145440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172644771 (or 172644763 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

The spelling of 3121415145440 in words is "three trillion, one hundred twenty-one billion, four hundred fifteen million, one hundred forty-five thousand, four hundred forty".