7138400827738 has 4 divisors (see below), whose sum is σ = 10707601241610. Its totient is φ = 3569200413868.

The previous prime is 7138400827721. The next prime is 7138400827751. The reversal of 7138400827738 is 8377280048317.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4695078576969 + 2443322250769 = 2166813^2 + 1563113^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1784600206933 + ... + 1784600206936.

Almost surely, 2^{7138400827738} is an apocalyptic number.

7138400827738 is a deficient number, since it is larger than the sum of its proper divisors (3569200413872).

7138400827738 is a wasteful number, since it uses less digits than its factorization.

7138400827738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3569200413871.

The product of its (nonzero) digits is 12644352, while the sum is 58.

The spelling of 7138400827738 in words is "seven trillion, one hundred thirty-eight billion, four hundred million, eight hundred twenty-seven thousand, seven hundred thirty-eight".