409365491601 has 12 divisors (see below), whose sum is σ = 599951630096. Its totient is φ = 248100297720.

The previous prime is 409365491569. The next prime is 409365491611. The reversal of 409365491601 is 106194563904.

It is a happy number.

It is not a de Polignac number, because 409365491601 - 2⁵ = 409365491569 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409365491611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 563863951 + ... + 563864676.

Almost surely, 2^409365491601 is an apocalyptic number.

It is an amenable number.

409365491601 is a deficient number, since it is larger than the sum of its proper divisors (190586138495).

409365491601 is a wasteful number, since it uses less digits than its factorization.

409365491601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127728652 (or 1127728641 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 48.

The spelling of 409365491601 in words is "four hundred nine billion, three hundred sixty-five million, four hundred ninety-one thousand, six hundred one".