406779109173546 has 32 divisors (see below), whose sum is σ = 814034134368000. Its totient is φ = 135513724378560.

The previous prime is 406779109173517. The next prime is 406779109173553. The reversal of 406779109173546 is 645371901977604.

It is a super-2 number, since 2×406779109173546² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223940980 + ... + 225750128.

It is an arithmetic number, because the mean of its divisors is an integer number (25438566699000).

Almost surely, 2^{406779109173546} is an apocalyptic number.

406779109173546 is an abundant number, since it is smaller than the sum of its proper divisors (407255025194454).

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

406779109173546 is a wasteful number, since it uses less digits than its factorization.

406779109173546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831054.

The product of its (nonzero) digits is 240045120, while the sum is 69.

The spelling of 406779109173546 in words is "four hundred six trillion, seven hundred seventy-nine billion, one hundred nine million, one hundred seventy-three thousand, five hundred forty-six".