7138121745856 has 28 divisors (see below), whose sum is σ = 14272837916040. Its totient is φ = 3541816129280.

The previous prime is 7138121745851. The next prime is 7138121745899. The reversal of 7138121745856 is 6585471218317.

It is a self number, because there is not a number n which added to its sum of digits gives 7138121745856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7138121745851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425690671 + ... + 425707438.

Almost surely, 2^{7138121745856} is an apocalyptic number.

It is an amenable number.

7138121745856 is a deficient number, since it is larger than the sum of its proper divisors (7134716170184).

7138121745856 is a wasteful number, since it uses less digits than its factorization.

7138121745856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851398252 (or 851398242 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 58.

The spelling of 7138121745856 in words is "seven trillion, one hundred thirty-eight billion, one hundred twenty-one million, seven hundred forty-five thousand, eight hundred fifty-six".