7138121745855 has 32 divisors (see below), whose sum is σ = 11917862760960. Its totient is φ = 3641384024960.

The previous prime is 7138121745851. The next prime is 7138121745899. The reversal of 7138121745855 is 5585471218317.

It is not a de Polignac number, because 7138121745855 - 2² = 7138121745851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7138121745795 and 7138121745804.

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 31 ways as a sum of consecutive naturals, for example, 14531656 + ... + 15014834.

It is an arithmetic number, because the mean of its divisors is an integer number (372433211280).

Almost surely, 2^{7138121745855} is an apocalyptic number.

7138121745855 is a deficient number, since it is larger than the sum of its proper divisors (4779741015105).

7138121745855 is a wasteful number, since it uses less digits than its factorization.

7138121745855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526031.

The product of its digits is 9408000, while the sum is 57.

The spelling of 7138121745855 in words is "seven trillion, one hundred thirty-eight billion, one hundred twenty-one million, seven hundred forty-five thousand, eight hundred fifty-five".