401421419977 has 2 divisors, whose sum is σ = 401421419978. Its totient is φ = 401421419976.

The previous prime is 401421419933. The next prime is 401421420047. The reversal of 401421419977 is 779914124104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312753851536 + 88667568441 = 559244^2 + 297771^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401421419977 is a prime.

It is a super-2 number, since 2×401421419977² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401421419977.

It is not a weakly prime, because it can be changed into another prime (401421419177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200710709988 + 200710709989.

It is an arithmetic number, because the mean of its divisors is an integer number (200710709989).

Almost surely, 2^401421419977 is an apocalyptic number.

It is an amenable number.

401421419977 is a deficient number, since it is larger than the sum of its proper divisors (1).

401421419977 is an equidigital number, since it uses as much as digits as its factorization.

401421419977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 401421419977 in words is "four hundred one billion, four hundred twenty-one million, four hundred nineteen thousand, nine hundred seventy-seven".