7138128153250 has 32 divisors (see below), whose sum is σ = 13485168393840. Its totient is φ = 2829056284800.

The previous prime is 7138128153199. The next prime is 7138128153349. The reversal of 7138128153250 is 523518218317.

It can be written as a sum of positive squares in 8 ways, for example, as 391449184281 + 6746678968969 = 625659^2 + 2597437^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7138128153250.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130947579 + ... + 131002078.

Almost surely, 2^{7138128153250} is an apocalyptic number.

7138128153250 is a deficient number, since it is larger than the sum of its proper divisors (6347040240590).

7138128153250 is a wasteful number, since it uses less digits than its factorization.

7138128153250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261949783 (or 261949773 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 7138128153250 in words is "seven trillion, one hundred thirty-eight billion, one hundred twenty-eight million, one hundred fifty-three thousand, two hundred fifty".