75009321428 has 12 divisors (see below), whose sum is σ = 131370583680. Its totient is φ = 37474868952.

The previous prime is 75009321421. The next prime is 75009321463. The reversal of 75009321428 is 82412390057.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75009321421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7442276 + ... + 7452347.

It is an arithmetic number, because the mean of its divisors is an integer number (10947548640).

Almost surely, 2^75009321428 is an apocalyptic number.

It is an amenable number.

75009321428 is a deficient number, since it is larger than the sum of its proper divisors (56361262252).

75009321428 is a wasteful number, since it uses less digits than its factorization.

75009321428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14895886 (or 14895884 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 75009321428 in words is "seventy-five billion, nine million, three hundred twenty-one thousand, four hundred twenty-eight".