378578501685 has 24 divisors (see below), whose sum is σ = 660228532704. Its totient is φ = 200669827680.

The previous prime is 378578501663. The next prime is 378578501687. The reversal of 378578501685 is 586105875873.

378578501685 is a `hidden beast` number, since 3 + 7 + 8 + 578 + 50 + 1 + 6 + 8 + 5 = 666.

It is not a de Polignac number, because 378578501685 - 2⁶ = 378578501621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378578501687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25798971 + ... + 25813640.

It is an arithmetic number, because the mean of its divisors is an integer number (27509522196).

Almost surely, 2^378578501685 is an apocalyptic number.

It is an amenable number.

378578501685 is a deficient number, since it is larger than the sum of its proper divisors (281650031019).

378578501685 is a wasteful number, since it uses less digits than its factorization.

378578501685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51612785 (or 51612782 counting only the distinct ones).

The product of its (nonzero) digits is 56448000, while the sum is 63.

The spelling of 378578501685 in words is "three hundred seventy-eight billion, five hundred seventy-eight million, five hundred one thousand, six hundred eighty-five".