385316815780 has 48 divisors (see below), whose sum is σ = 871454208240. Its totient is φ = 142263410688.

The previous prime is 385316815729. The next prime is 385316815789. The reversal of 385316815780 is 87518613583.

It can be written as a sum of positive squares in 8 ways, for example, as 626601024 + 384690214756 = 25032^2 + 620234^2 .

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (385316815789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9239616 + ... + 9281224.

It is an arithmetic number, because the mean of its divisors is an integer number (18155296005).

Almost surely, 2^385316815780 is an apocalyptic number.

It is an amenable number.

385316815780 is an abundant number, since it is smaller than the sum of its proper divisors (486137392460).

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

385316815780 is a wasteful number, since it uses less digits than its factorization.

385316815780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77248 (or 77246 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 385316815780 in words is "three hundred eighty-five billion, three hundred sixteen million, eight hundred fifteen thousand, seven hundred eighty".