6401602631 has 2 divisors, whose sum is σ = 6401602632. Its totient is φ = 6401602630.

The previous prime is 6401602573. The next prime is 6401602661. The reversal of 6401602631 is 1362061046.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6401602631 - 2⁶ = 6401602567 is a prime.

It is a super-3 number, since 3×6401602631³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 6401602594 and 6401602603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6401602661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200801315 + 3200801316.

It is an arithmetic number, because the mean of its divisors is an integer number (3200801316).

Almost surely, 2^6401602631 is an apocalyptic number.

6401602631 is a deficient number, since it is larger than the sum of its proper divisors (1).

6401602631 is an equidigital number, since it uses as much as digits as its factorization.

6401602631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 6401602631 is about 80010.0158167713. The cubic root of 6401602631 is about 1856.7904945560.

Adding to 6401602631 its reverse (1362061046), we get a palindrome (7763663677).

The spelling of 6401602631 in words is "six billion, four hundred one million, six hundred two thousand, six hundred thirty-one".