409391572645 has 16 divisors (see below), whose sum is σ = 535956108480. Its totient is φ = 297725257600.

The previous prime is 409391572643. The next prime is 409391572657. The reversal of 409391572645 is 546275193904.

It is not a de Polignac number, because 409391572645 - 2¹ = 409391572643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409391572643) 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, 1079505 + ... + 1408585.

It is an arithmetic number, because the mean of its divisors is an integer number (33497256780).

Almost surely, 2^409391572645 is an apocalyptic number.

It is an amenable number.

409391572645 is a deficient number, since it is larger than the sum of its proper divisors (126564535835).

409391572645 is a wasteful number, since it uses less digits than its factorization.

409391572645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351716.

The product of its (nonzero) digits is 8164800, while the sum is 55.

The spelling of 409391572645 in words is "four hundred nine billion, three hundred ninety-one million, five hundred seventy-two thousand, six hundred forty-five".