401541611993 has 2 divisors, whose sum is σ = 401541611994. Its totient is φ = 401541611992.

The previous prime is 401541611987. The next prime is 401541612013. The reversal of 401541611993 is 399116145104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388013130649 + 13528481344 = 622907^2 + 116312^2 .

It is a cyclic number.

It is not a de Polignac number, because 401541611993 - 2²² = 401537417689 is a prime.

It is a super-2 number, since 2×401541611993² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401541631993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200770805996 + 200770805997.

It is an arithmetic number, because the mean of its divisors is an integer number (200770805997).

Almost surely, 2^401541611993 is an apocalyptic number.

It is an amenable number.

401541611993 is a deficient number, since it is larger than the sum of its proper divisors (1).

401541611993 is an equidigital number, since it uses as much as digits as its factorization.

401541611993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 401541611993 in words is "four hundred one billion, five hundred forty-one million, six hundred eleven thousand, nine hundred ninety-three".