400611221475623 has 2 divisors, whose sum is σ = 400611221475624. Its totient is φ = 400611221475622.

The previous prime is 400611221475541. The next prime is 400611221475653. The reversal of 400611221475623 is 326574122116004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400611221475623 - 2⁴⁸ = 119136244764967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400611221475653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200305610737811 + 200305610737812.

It is an arithmetic number, because the mean of its divisors is an integer number (200305610737812).

Almost surely, 2^{400611221475623} is an apocalyptic number.

400611221475623 is a deficient number, since it is larger than the sum of its proper divisors (1).

400611221475623 is an equidigital number, since it uses as much as digits as its factorization.

400611221475623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 400611221475623 in words is "four hundred trillion, six hundred eleven billion, two hundred twenty-one million, four hundred seventy-five thousand, six hundred twenty-three".