400656556211 has 4 divisors (see below), whose sum is σ = 421743743400. Its totient is φ = 379569369024.

The previous prime is 400656556199. The next prime is 400656556231. The reversal of 400656556211 is 112655656004.

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

It is a cyclic number.

It is not a de Polignac number, because 400656556211 - 2¹⁴ = 400656539827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400656556231) 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, 10543593566 + ... + 10543593603.

It is an arithmetic number, because the mean of its divisors is an integer number (105435935850).

Almost surely, 2^400656556211 is an apocalyptic number.

400656556211 is a deficient number, since it is larger than the sum of its proper divisors (21087187189).

400656556211 is a wasteful number, since it uses less digits than its factorization.

400656556211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21087187188.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 400656556211 in words is "four hundred billion, six hundred fifty-six million, five hundred fifty-six thousand, two hundred eleven".