405785667616 has 48 divisors (see below), whose sum is σ = 916313985216. Its totient is φ = 173280289536.

The previous prime is 405785667607. The next prime is 405785667671. The reversal of 405785667616 is 616766587504.

It is a super-2 number, since 2×405785667616² (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 7 ways as a sum of consecutive naturals, for example, 3207886 + ... + 3331981.

It is an arithmetic number, because the mean of its divisors is an integer number (19089874692).

Almost surely, 2^405785667616 is an apocalyptic number.

It is an amenable number.

405785667616 is an abundant number, since it is smaller than the sum of its proper divisors (510528317600).

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

405785667616 is a wasteful number, since it uses less digits than its factorization.

405785667616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6540161 (or 6540153 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 61.

The spelling of 405785667616 in words is "four hundred five billion, seven hundred eighty-five million, six hundred sixty-seven thousand, six hundred sixteen".