400946111999 has 4 divisors (see below), whose sum is σ = 400948505064. Its totient is φ = 400943718936.

The previous prime is 400946111921. The next prime is 400946112131. The reversal of 400946111999 is 999111649004.

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-400946111999 is a prime.

It is a super-2 number, since 2×400946111999² (a number of 24 digits) contains 22 as substring.

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 400946111999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400946711999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924617 + ... + 1287170.

It is an arithmetic number, because the mean of its divisors is an integer number (100237126266).

Almost surely, 2^400946111999 is an apocalyptic number.

400946111999 is a deficient number, since it is larger than the sum of its proper divisors (2393065).

400946111999 is a wasteful number, since it uses less digits than its factorization.

400946111999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2393064.

The product of its (nonzero) digits is 629856, while the sum is 53.

The spelling of 400946111999 in words is "four hundred billion, nine hundred forty-six million, one hundred eleven thousand, nine hundred ninety-nine".