6885385409787 has 32 divisors (see below), whose sum is σ = 9474245114880. Its totient is φ = 4445068320000.

The previous prime is 6885385409783. The next prime is 6885385409797. The reversal of 6885385409787 is 7879045835886.

It is not a de Polignac number, because 6885385409787 - 2² = 6885385409783 is a prime.

It is a super-4 number, since 4×6885385409787⁴ (a number of 52 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (6885385409783) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78961662 + ... + 79048812.

It is an arithmetic number, because the mean of its divisors is an integer number (296070159840).

Almost surely, 2^{6885385409787} is an apocalyptic number.

6885385409787 is a deficient number, since it is larger than the sum of its proper divisors (2588859705093).

6885385409787 is a wasteful number, since it uses less digits than its factorization.

6885385409787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91955.

The product of its (nonzero) digits is 3251404800, while the sum is 78.

The spelling of 6885385409787 in words is "six trillion, eight hundred eighty-five billion, three hundred eighty-five million, four hundred nine thousand, seven hundred eighty-seven".