406312195991 has 32 divisors (see below), whose sum is σ = 463463616000. Its totient is φ = 353488157568.

The previous prime is 406312195981. The next prime is 406312196041. The reversal of 406312195991 is 199591213604.

It is not a de Polignac number, because 406312195991 - 2¹⁴ = 406312179607 is a prime.

It is a super-2 number, since 2×406312195991² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406312195901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30453800 + ... + 30467138.

It is an arithmetic number, because the mean of its divisors is an integer number (14483238000).

Almost surely, 2^406312195991 is an apocalyptic number.

406312195991 is a deficient number, since it is larger than the sum of its proper divisors (57151420009).

406312195991 is a wasteful number, since it uses less digits than its factorization.

406312195991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15303.

The product of its (nonzero) digits is 524880, while the sum is 50.

The spelling of 406312195991 in words is "four hundred six billion, three hundred twelve million, one hundred ninety-five thousand, nine hundred ninety-one".