403816604985 has 40 divisors (see below), whose sum is σ = 755351657280. Its totient is φ = 206004987936.

The previous prime is 403816604977. The next prime is 403816605097. The reversal of 403816604985 is 589406618304.

It is not a de Polignac number, because 403816604985 - 2³ = 403816604977 is a prime.

It is a super-2 number, since 2×403816604985² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 21666295 + ... + 21684924.

It is an arithmetic number, because the mean of its divisors is an integer number (18883791432).

Almost surely, 2^403816604985 is an apocalyptic number.

403816604985 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

403816604985 is a deficient number, since it is larger than the sum of its proper divisors (351535052295).

403816604985 is a wasteful number, since it uses less digits than its factorization.

403816604985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43351259 (or 43351250 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 403816604985 in words is "four hundred three billion, eight hundred sixteen million, six hundred four thousand, nine hundred eighty-five".