7138400061887 has 2 divisors, whose sum is σ = 7138400061888. Its totient is φ = 7138400061886.

The previous prime is 7138400061883. The next prime is 7138400061893. The reversal of 7138400061887 is 7881600048317.

It is a weak prime.

It is an emirp because it is prime and its reverse (7881600048317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7138400061887 - 2² = 7138400061883 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7138400061883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3569200030943 + 3569200030944.

It is an arithmetic number, because the mean of its divisors is an integer number (3569200030944).

Almost surely, 2^{7138400061887} is an apocalyptic number.

7138400061887 is a deficient number, since it is larger than the sum of its proper divisors (1).

7138400061887 is an equidigital number, since it uses as much as digits as its factorization.

7138400061887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1806336, while the sum is 53.

The spelling of 7138400061887 in words is "seven trillion, one hundred thirty-eight billion, four hundred million, sixty-one thousand, eight hundred eighty-seven".