401847965641 has 4 divisors (see below), whose sum is σ = 402093445572. Its totient is φ = 401602485712.

The previous prime is 401847965593. The next prime is 401847965647. The reversal of 401847965641 is 146569748104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 166603565241 + 235244400400 = 408171^2 + 485020^2 .

It is a cyclic number.

It is not a de Polignac number, because 401847965641 - 2¹⁵ = 401847932873 is a prime.

It is a super-2 number, since 2×401847965641² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401847965647) 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 in 3 ways as a sum of consecutive naturals, for example, 122737510 + ... + 122740783.

It is an arithmetic number, because the mean of its divisors is an integer number (100523361393).

Almost surely, 2^401847965641 is an apocalyptic number.

It is an amenable number.

401847965641 is a deficient number, since it is larger than the sum of its proper divisors (245479931).

401847965641 is a wasteful number, since it uses less digits than its factorization.

401847965641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245479930.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 401847965641 in words is "four hundred one billion, eight hundred forty-seven million, nine hundred sixty-five thousand, six hundred forty-one".