65378643 has 16 divisors (see below), whose sum is σ = 95232000. Its totient is φ = 39566880.

The previous prime is 65378633. The next prime is 65378657. The reversal of 65378643 is 34687356.

It is not a de Polignac number, because 65378643 - 2⁸ = 65378387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65378595 and 65378604.

It is not an unprimeable number, because it can be changed into a prime (65378623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41433 + ... + 42981.

It is an arithmetic number, because the mean of its divisors is an integer number (5952000).

Almost surely, 2^65378643 is an apocalyptic number.

65378643 is a deficient number, since it is larger than the sum of its proper divisors (29853357).

65378643 is a wasteful number, since it uses less digits than its factorization.

65378643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2842.

The product of its digits is 362880, while the sum is 42.

The square root of 65378643 is about 8085.7060916162. The cubic root of 65378643 is about 402.8517927929.

The spelling of 65378643 in words is "sixty-five million, three hundred seventy-eight thousand, six hundred forty-three".