406177921371 has 16 divisors (see below), whose sum is σ = 542032053920. Its totient is φ = 270554618880.

The previous prime is 406177921361. The next prime is 406177921381. The reversal of 406177921371 is 173129771604.

It is an interprime number because it is at equal distance from previous prime (406177921361) and next prime (406177921381).

It is not a de Polignac number, because 406177921371 - 2¹³ = 406177913179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406177921371.

It is not an unprimeable number, because it can be changed into a prime (406177921361) 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, 31624911 + ... + 31637751.

It is an arithmetic number, because the mean of its divisors is an integer number (33877003370).

Almost surely, 2^406177921371 is an apocalyptic number.

406177921371 is a deficient number, since it is larger than the sum of its proper divisors (135854132549).

406177921371 is a wasteful number, since it uses less digits than its factorization.

406177921371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21006.

The product of its (nonzero) digits is 444528, while the sum is 48.

The spelling of 406177921371 in words is "four hundred six billion, one hundred seventy-seven million, nine hundred twenty-one thousand, three hundred seventy-one".