68644419 has 16 divisors (see below), whose sum is σ = 97384320. Its totient is φ = 42860160.

The previous prime is 68644409. The next prime is 68644423. The reversal of 68644419 is 91444686.

It is not a de Polignac number, because 68644419 - 2²¹ = 66547267 is a prime.

It is a super-2 number, since 2×68644419² = 9424112519695122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68644409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7572 + ... + 13950.

It is an arithmetic number, because the mean of its divisors is an integer number (6086520).

Almost surely, 2^68644419 is an apocalyptic number.

68644419 is a deficient number, since it is larger than the sum of its proper divisors (28739901).

68644419 is a wasteful number, since it uses less digits than its factorization.

68644419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6610.

The product of its digits is 165888, while the sum is 42.

The square root of 68644419 is about 8285.1927557541. The cubic root of 68644419 is about 409.4508193504.

The spelling of 68644419 in words is "sixty-eight million, six hundred forty-four thousand, four hundred nineteen".