67644157348 has 6 divisors (see below), whose sum is σ = 118377275366. Its totient is φ = 33822078672.

The previous prime is 67644157331. The next prime is 67644157349. The reversal of 67644157348 is 84375144676.

It can be written as a sum of positive squares in only one way, i.e., 65041321024 + 2602836324 = 255032^2 + 51018^2 .

It is not an unprimeable number, because it can be changed into a prime (67644157349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8455519665 + ... + 8455519672.

Almost surely, 2^67644157348 is an apocalyptic number.

It is an amenable number.

67644157348 is a deficient number, since it is larger than the sum of its proper divisors (50733118018).

67644157348 is a wasteful number, since it uses less digits than its factorization.

67644157348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16911039341 (or 16911039339 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 55.

The spelling of 67644157348 in words is "sixty-seven billion, six hundred forty-four million, one hundred fifty-seven thousand, three hundred forty-eight".