74321000138 has 32 divisors (see below), whose sum is σ = 139040350848. Its totient is φ = 28945728000.

The previous prime is 74321000137. The next prime is 74321000141. The reversal of 74321000138 is 83100012347.

It is a super-2 number, since 2×74321000138² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74321000138.

It is not an unprimeable number, because it can be changed into a prime (74321000137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345206 + ... + 517502.

It is an arithmetic number, because the mean of its divisors is an integer number (4345010964).

Almost surely, 2^74321000138 is an apocalyptic number.

74321000138 is a deficient number, since it is larger than the sum of its proper divisors (64719350710).

74321000138 is a wasteful number, since it uses less digits than its factorization.

74321000138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175118.

The product of its (nonzero) digits is 4032, while the sum is 29.

The spelling of 74321000138 in words is "seventy-four billion, three hundred twenty-one million, one hundred thirty-eight", and thus it is an aban number.