417645021923 has 2 divisors, whose sum is σ = 417645021924. Its totient is φ = 417645021922.

The previous prime is 417645021901. The next prime is 417645021967. The reversal of 417645021923 is 329120546714.

It is an a-pointer prime, because the next prime (417645021967) can be obtained adding 417645021923 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 417645021923 - 2²⁸ = 417376586467 is a prime.

It is not a weakly prime, because it can be changed into another prime (417645321923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208822510961 + 208822510962.

It is an arithmetic number, because the mean of its divisors is an integer number (208822510962).

Almost surely, 2^417645021923 is an apocalyptic number.

417645021923 is a deficient number, since it is larger than the sum of its proper divisors (1).

417645021923 is an equidigital number, since it uses as much as digits as its factorization.

417645021923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 417645021923 in words is "four hundred seventeen billion, six hundred forty-five million, twenty-one thousand, nine hundred twenty-three".