385400603681 has 16 divisors (see below), whose sum is σ = 419974800000. Its totient is φ = 352273453056.

The previous prime is 385400603657. The next prime is 385400603683. The reversal of 385400603681 is 186306004583.

It is a cyclic number.

It is not a de Polignac number, because 385400603681 - 2¹⁸ = 385400341537 is a prime.

It is a super-2 number, since 2×385400603681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385400603683) 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, 520865 + ... + 1020833.

It is an arithmetic number, because the mean of its divisors is an integer number (26248425000).

Almost surely, 2^385400603681 is an apocalyptic number.

It is an amenable number.

385400603681 is a deficient number, since it is larger than the sum of its proper divisors (34574196319).

385400603681 is a wasteful number, since it uses less digits than its factorization.

385400603681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501416.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 385400603681 in words is "three hundred eighty-five billion, four hundred million, six hundred three thousand, six hundred eighty-one".