75321981002 has 4 divisors (see below), whose sum is σ = 112982971506. Its totient is φ = 37660990500.

The previous prime is 75321980989. The next prime is 75321981023. The reversal of 75321981002 is 20018912357.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 73279031401 + 2042949601 = 270701^2 + 45199^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18830495249 + ... + 18830495252.

Almost surely, 2^75321981002 is an apocalyptic number.

75321981002 is a deficient number, since it is larger than the sum of its proper divisors (37660990504).

75321981002 is a wasteful number, since it uses less digits than its factorization.

75321981002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37660990503.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 75321981002 in words is "seventy-five billion, three hundred twenty-one million, nine hundred eighty-one thousand, two".