7212146128436 has 48 divisors (see below), whose sum is σ = 13843362108240. Its totient is φ = 3272447109120.

The previous prime is 7212146128433. The next prime is 7212146128457. The reversal of 7212146128436 is 6348216412127.

It can be written as a sum of positive squares in 8 ways, for example, as 3870584064400 + 3341562064036 = 1967380^2 + 1827994^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7212146128433) 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, 1049255 + ... + 3940206.

It is an arithmetic number, because the mean of its divisors is an integer number (288403377255).

Almost surely, 2^{7212146128436} is an apocalyptic number.

It is an amenable number.

7212146128436 is a deficient number, since it is larger than the sum of its proper divisors (6631215979804).

7212146128436 is a wasteful number, since it uses less digits than its factorization.

7212146128436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4990244 (or 4990242 counting only the distinct ones).

The product of its digits is 774144, while the sum is 47.

The spelling of 7212146128436 in words is "seven trillion, two hundred twelve billion, one hundred forty-six million, one hundred twenty-eight thousand, four hundred thirty-six".