64103643 has 24 divisors (see below), whose sum is σ = 96497856. Its totient is φ = 42525000.

The previous prime is 64103609. The next prime is 64103693. The reversal of 64103643 is 34630146.

64103643 is a `hidden beast` number, since 6 + 4 + 10 + 3 + 643 = 666.

It is not a de Polignac number, because 64103643 - 2²¹ = 62006491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (64103693) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60468 + ... + 61518.

It is an arithmetic number, because the mean of its divisors is an integer number (4020744).

Almost surely, 2^64103643 is an apocalyptic number.

64103643 is a deficient number, since it is larger than the sum of its proper divisors (32394213).

64103643 is a wasteful number, since it uses less digits than its factorization.

64103643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317 (or 1305 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 64103643 is about 8006.4750670941. The cubic root of 64103643 is about 400.2158064647.

Adding to 64103643 its reverse (34630146), we get a palindrome (98733789).

It can be divided in two parts, 64103 and 643, that added together give a palindrome (64746).

The spelling of 64103643 in words is "sixty-four million, one hundred three thousand, six hundred forty-three".