74642195128 has 8 divisors (see below), whose sum is σ = 139954115880. Its totient is φ = 37321097560.

The previous prime is 74642195101. The next prime is 74642195141. The reversal of 74642195128 is 82159124647.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4665137188 + ... + 4665137203.

It is an arithmetic number, because the mean of its divisors is an integer number (17494264485).

Almost surely, 2^74642195128 is an apocalyptic number.

It is an amenable number.

74642195128 is a deficient number, since it is larger than the sum of its proper divisors (65311920752).

74642195128 is a wasteful number, since it uses less digits than its factorization.

74642195128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9330274397 (or 9330274393 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The spelling of 74642195128 in words is "seventy-four billion, six hundred forty-two million, one hundred ninety-five thousand, one hundred twenty-eight".