402144223230977 has 2 divisors, whose sum is σ = 402144223230978. Its totient is φ = 402144223230976.

The previous prime is 402144223230961. The next prime is 402144223231061. The reversal of 402144223230977 is 779032322441204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316464744775936 + 85679478455041 = 17789456^2 + 9256321^2 .

It is a cyclic number.

It is not a de Polignac number, because 402144223230977 - 2⁴ = 402144223230961 is a prime.

It is a super-2 number, since 2×402144223230977² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (402144223230917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201072111615488 + 201072111615489.

It is an arithmetic number, because the mean of its divisors is an integer number (201072111615489).

Almost surely, 2^{402144223230977} is an apocalyptic number.

It is an amenable number.

402144223230977 is a deficient number, since it is larger than the sum of its proper divisors (1).

402144223230977 is an equidigital number, since it uses as much as digits as its factorization.

402144223230977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 50.

The spelling of 402144223230977 in words is "four hundred two trillion, one hundred forty-four billion, two hundred twenty-three million, two hundred thirty thousand, nine hundred seventy-seven".