3081781378485 has 48 divisors (see below), whose sum is σ = 5542263679680. Its totient is φ = 1642825566720.

The previous prime is 3081781378477. The next prime is 3081781378519. The reversal of 3081781378485 is 5848731871803.

3081781378485 is a `hidden beast` number, since 3 + 0 + 8 + 1 + 7 + 81 + 3 + 78 + 485 = 666.

It is not a de Polignac number, because 3081781378485 - 2³ = 3081781378477 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1918986 + ... + 3137844.

It is an arithmetic number, because the mean of its divisors is an integer number (115463826660).

Almost surely, 2^{3081781378485} is an apocalyptic number.

It is an amenable number.

3081781378485 is a deficient number, since it is larger than the sum of its proper divisors (2460482301195).

3081781378485 is a wasteful number, since it uses less digits than its factorization.

3081781378485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220960 (or 1220948 counting only the distinct ones).

The product of its (nonzero) digits is 36126720, while the sum is 63.

The spelling of 3081781378485 in words is "three trillion, eighty-one billion, seven hundred eighty-one million, three hundred seventy-eight thousand, four hundred eighty-five".