401225446477 has 2 divisors, whose sum is σ = 401225446478. Its totient is φ = 401225446476.

The previous prime is 401225446451. The next prime is 401225446493. The reversal of 401225446477 is 774644522104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231756550921 + 169468895556 = 481411^2 + 411666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401225446477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401225446277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200612723238 + 200612723239.

It is an arithmetic number, because the mean of its divisors is an integer number (200612723239).

Almost surely, 2^401225446477 is an apocalyptic number.

It is an amenable number.

401225446477 is a deficient number, since it is larger than the sum of its proper divisors (1).

401225446477 is an equidigital number, since it uses as much as digits as its factorization.

401225446477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1505280, while the sum is 46.

The spelling of 401225446477 in words is "four hundred one billion, two hundred twenty-five million, four hundred forty-six thousand, four hundred seventy-seven".