406518170578649 has 4 divisors (see below), whose sum is σ = 412243778615040. Its totient is φ = 400792562542260.

The previous prime is 406518170578609. The next prime is 406518170578679. The reversal of 406518170578649 is 946875071815604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406518170578649 is a prime.

It is a super-2 number, since 2×406518170578649² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (71), and also a Moran number because the ratio is a prime number: 5725608036319 = 406518170578649 / (4 + 0 + 6 + 5 + 1 + 8 + 1 + 7 + 0 + 5 + 7 + 8 + 6 + 4 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406518170578609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2862804018089 + ... + 2862804018230.

It is an arithmetic number, because the mean of its divisors is an integer number (103060944653760).

Almost surely, 2^{406518170578649} is an apocalyptic number.

It is an amenable number.

406518170578649 is a deficient number, since it is larger than the sum of its proper divisors (5725608036391).

406518170578649 is an equidigital number, since it uses as much as digits as its factorization.

406518170578649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5725608036390.

The product of its (nonzero) digits is 406425600, while the sum is 71.

The spelling of 406518170578649 in words is "four hundred six trillion, five hundred eighteen billion, one hundred seventy million, five hundred seventy-eight thousand, six hundred forty-nine".