401847965647 has 2 divisors, whose sum is σ = 401847965648. Its totient is φ = 401847965646.

The previous prime is 401847965593. The next prime is 401847965657. The reversal of 401847965647 is 746569748104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401847965647 - 2²³ = 401839577039 is a prime.

It is a super-2 number, since 2×401847965647² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401847965657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200923982823 + 200923982824.

It is an arithmetic number, because the mean of its divisors is an integer number (200923982824).

Almost surely, 2^401847965647 is an apocalyptic number.

401847965647 is a deficient number, since it is larger than the sum of its proper divisors (1).

401847965647 is an equidigital number, since it uses as much as digits as its factorization.

401847965647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40642560, while the sum is 61.

The spelling of 401847965647 in words is "four hundred one billion, eight hundred forty-seven million, nine hundred sixty-five thousand, six hundred forty-seven".