406199515871 has 4 divisors (see below), whose sum is σ = 406942111512. Its totient is φ = 405456920232.

The previous prime is 406199515861. The next prime is 406199515903. The reversal of 406199515871 is 178515991604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406199515871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406199515801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371297000 + ... + 371298093.

It is an arithmetic number, because the mean of its divisors is an integer number (101735527878).

Almost surely, 2^406199515871 is an apocalyptic number.

406199515871 is a deficient number, since it is larger than the sum of its proper divisors (742595641).

406199515871 is an equidigital number, since it uses as much as digits as its factorization.

406199515871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742595640.

The product of its (nonzero) digits is 2721600, while the sum is 56.

The spelling of 406199515871 in words is "four hundred six billion, one hundred ninety-nine million, five hundred fifteen thousand, eight hundred seventy-one".