401511502673 has 2 divisors, whose sum is σ = 401511502674. Its totient is φ = 401511502672.

The previous prime is 401511502649. The next prime is 401511502681. The reversal of 401511502673 is 376205115104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399331733329 + 2179769344 = 631927^2 + 46688^2 .

It is a cyclic number.

It is not a de Polignac number, because 401511502673 - 2⁸ = 401511502417 is a prime.

It is a super-2 number, since 2×401511502673² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (401511502633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200755751336 + 200755751337.

It is an arithmetic number, because the mean of its divisors is an integer number (200755751337).

Almost surely, 2^401511502673 is an apocalyptic number.

It is an amenable number.

401511502673 is a deficient number, since it is larger than the sum of its proper divisors (1).

401511502673 is an equidigital number, since it uses as much as digits as its factorization.

401511502673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

Adding to 401511502673 its reverse (376205115104), we get a palindrome (777716617777).

The spelling of 401511502673 in words is "four hundred one billion, five hundred eleven million, five hundred two thousand, six hundred seventy-three".