67128305960 has 32 divisors (see below), whose sum is σ = 159923318760. Its totient is φ = 25271832576.

The previous prime is 67128305921. The next prime is 67128305969. The reversal of 67128305960 is 6950382176.

It can be written as a sum of positive squares in 4 ways, for example, as 52823667556 + 14304638404 = 229834^2 + 119602^2 .

It is a super-2 number, since 2×67128305960² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67128305969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49358369 + ... + 49359728.

Almost surely, 2^67128305960 is an apocalyptic number.

It is an amenable number.

67128305960 is an abundant number, since it is smaller than the sum of its proper divisors (92795012800).

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

67128305960 is a wasteful number, since it uses less digits than its factorization.

67128305960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98718125 (or 98718121 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 67128305960 in words is "sixty-seven billion, one hundred twenty-eight million, three hundred five thousand, nine hundred sixty".