401777350309 has 2 divisors, whose sum is σ = 401777350310. Its totient is φ = 401777350308.

The previous prime is 401777350307. The next prime is 401777350369. The reversal of 401777350309 is 903053777104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401772161025 + 5189284 = 633855^2 + 2278^2 .

It is a cyclic number.

It is not a de Polignac number, because 401777350309 - 2¹ = 401777350307 is a prime.

It is a super-2 number, since 2×401777350309² (a number of 24 digits) contains 22 as substring.

Together with 401777350307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401777350301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200888675154 + 200888675155.

It is an arithmetic number, because the mean of its divisors is an integer number (200888675155).

Almost surely, 2^401777350309 is an apocalyptic number.

It is an amenable number.

401777350309 is a deficient number, since it is larger than the sum of its proper divisors (1).

401777350309 is an equidigital number, since it uses as much as digits as its factorization.

401777350309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 555660, while the sum is 46.

The spelling of 401777350309 in words is "four hundred one billion, seven hundred seventy-seven million, three hundred fifty thousand, three hundred nine".