400811811479 has 2 divisors, whose sum is σ = 400811811480. Its totient is φ = 400811811478.

The previous prime is 400811811473. The next prime is 400811811487. The reversal of 400811811479 is 974118118004.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400811811479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400811811473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200405905739 + 200405905740.

It is an arithmetic number, because the mean of its divisors is an integer number (200405905740).

Almost surely, 2^400811811479 is an apocalyptic number.

400811811479 is a deficient number, since it is larger than the sum of its proper divisors (1).

400811811479 is an equidigital number, since it uses as much as digits as its factorization.

400811811479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 44.

The spelling of 400811811479 in words is "four hundred billion, eight hundred eleven million, eight hundred eleven thousand, four hundred seventy-nine".