74212128405 has 48 divisors (see below), whose sum is σ = 135453240000. Its totient is φ = 37483181568.

The previous prime is 74212128401. The next prime is 74212128421. The reversal of 74212128405 is 50482121247.

It is not a de Polignac number, because 74212128405 - 2² = 74212128401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74212128405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74212128401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2627046 + ... + 2655144.

It is an arithmetic number, because the mean of its divisors is an integer number (2821942500).

Almost surely, 2^74212128405 is an apocalyptic number.

It is an amenable number.

74212128405 is a deficient number, since it is larger than the sum of its proper divisors (61241111595).

74212128405 is a wasteful number, since it uses less digits than its factorization.

74212128405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31218 (or 31215 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The spelling of 74212128405 in words is "seventy-four billion, two hundred twelve million, one hundred twenty-eight thousand, four hundred five".