3870501786081 has 128 divisors (see below), whose sum is σ = 6734208000000. Its totient is φ = 2196138510720.

The previous prime is 3870501786071. The next prime is 3870501786083. The reversal of 3870501786081 is 1806871050783.

It is a happy number.

3870501786081 is a `hidden beast` number, since 3 + 8 + 7 + 0 + 501 + 78 + 60 + 8 + 1 = 666.

It is not a de Polignac number, because 3870501786081 - 2²¹ = 3870499688929 is a prime.

It is a super-2 number, since 2×3870501786081² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3870501786083) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1048630446 + ... + 1048634136.

It is an arithmetic number, because the mean of its divisors is an integer number (52611000000).

Almost surely, 2^{3870501786081} is an apocalyptic number.

It is an amenable number.

3870501786081 is a deficient number, since it is larger than the sum of its proper divisors (2863706213919).

3870501786081 is a wasteful number, since it uses less digits than its factorization.

3870501786081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4489 (or 4469 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 54.

The spelling of 3870501786081 in words is "three trillion, eight hundred seventy billion, five hundred one million, seven hundred eighty-six thousand, eighty-one".