40001642441 has 2 divisors, whose sum is σ = 40001642442. Its totient is φ = 40001642440.

The previous prime is 40001642437. The next prime is 40001642557. The reversal of 40001642441 is 14424610004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31869390400 + 8132252041 = 178520^2 + 90179^2 .

It is a cyclic number.

It is not a de Polignac number, because 40001642441 - 2² = 40001642437 is a prime.

It is a super-2 number, since 2×40001642441² (a number of 22 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 40001642441.

It is not a weakly prime, because it can be changed into another prime (40001642411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20000821220 + 20000821221.

It is an arithmetic number, because the mean of its divisors is an integer number (20000821221).

Almost surely, 2^40001642441 is an apocalyptic number.

It is an amenable number.

40001642441 is a deficient number, since it is larger than the sum of its proper divisors (1).

40001642441 is an equidigital number, since it uses as much as digits as its factorization.

40001642441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 26.

The spelling of 40001642441 in words is "forty billion, one million, six hundred forty-two thousand, four hundred forty-one".