401511535541 has 2 divisors, whose sum is σ = 401511535542. Its totient is φ = 401511535540.

The previous prime is 401511535531. The next prime is 401511535543. The reversal of 401511535541 is 145535115104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284564634916 + 116946900625 = 533446^2 + 341975^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401511535541 is a prime.

It is a super-2 number, since 2×401511535541² (a number of 24 digits) contains 22 as substring.

Together with 401511535543, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401511535543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200755767770 + 200755767771.

It is an arithmetic number, because the mean of its divisors is an integer number (200755767771).

Almost surely, 2^401511535541 is an apocalyptic number.

It is an amenable number.

401511535541 is a deficient number, since it is larger than the sum of its proper divisors (1).

401511535541 is an equidigital number, since it uses as much as digits as its factorization.

401511535541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30000, while the sum is 35.

The spelling of 401511535541 in words is "four hundred one billion, five hundred eleven million, five hundred thirty-five thousand, five hundred forty-one".