74775638428 has 12 divisors (see below), whose sum is σ = 130863138840. Its totient is φ = 37386170192.

The previous prime is 74775638417. The next prime is 74775638447. The reversal of 74775638428 is 82483657747.

It is a super-2 number, since 2×74775638428² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307258 + ... + 493921.

It is an arithmetic number, because the mean of its divisors is an integer number (10905261570).

Almost surely, 2^74775638428 is an apocalyptic number.

It is an amenable number.

74775638428 is a deficient number, since it is larger than the sum of its proper divisors (56087500412).

74775638428 is a wasteful number, since it uses less digits than its factorization.

74775638428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824516 (or 824514 counting only the distinct ones).

The product of its digits is 63221760, while the sum is 61.

The spelling of 74775638428 in words is "seventy-four billion, seven hundred seventy-five million, six hundred thirty-eight thousand, four hundred twenty-eight".