67649516394 has 16 divisors (see below), whose sum is σ = 135303704640. Its totient is φ = 22549060160.

The previous prime is 67649516387. The next prime is 67649516399. The reversal of 67649516394 is 49361594676.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (67649516399) 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 in 7 ways as a sum of consecutive naturals, for example, 10162 + ... + 367970.

It is an arithmetic number, because the mean of its divisors is an integer number (8456481540).

Almost surely, 2^67649516394 is an apocalyptic number.

67649516394 is an abundant number, since it is smaller than the sum of its proper divisors (67654188246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67649516394 is a wasteful number, since it uses less digits than its factorization.

67649516394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389325.

The product of its digits is 29393280, while the sum is 60.

The spelling of 67649516394 in words is "sixty-seven billion, six hundred forty-nine million, five hundred sixteen thousand, three hundred ninety-four".