3819720128540 has 48 divisors (see below), whose sum is σ = 8329749571584. Its totient is φ = 1469747400000.

The previous prime is 3819720128467. The next prime is 3819720128563. The reversal of 3819720128540 is 458210279183.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18342086 + ... + 18549165.

It is an arithmetic number, because the mean of its divisors is an integer number (173536449408).

Almost surely, 2^{3819720128540} is an apocalyptic number.

It is an amenable number.

3819720128540 is an abundant number, since it is smaller than the sum of its proper divisors (4510029443044).

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

3819720128540 is a wasteful number, since it uses less digits than its factorization.

3819720128540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36891458 (or 36891456 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 3819720128540 in words is "three trillion, eight hundred nineteen billion, seven hundred twenty million, one hundred twenty-eight thousand, five hundred forty".