7138837563681 has 16 divisors (see below), whose sum is σ = 10078418378304. Its totient is φ = 4479244199424.

The previous prime is 7138837563679. The next prime is 7138837563703. The reversal of 7138837563681 is 1863657388317.

It is not a de Polignac number, because 7138837563681 - 2¹ = 7138837563679 is a prime.

It is a super-2 number, since 2×7138837563681² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7138837563281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11852445 + ... + 12440181.

It is an arithmetic number, because the mean of its divisors is an integer number (629901148644).

Almost surely, 2^{7138837563681} is an apocalyptic number.

It is an amenable number.

7138837563681 is a deficient number, since it is larger than the sum of its proper divisors (2939580814623).

7138837563681 is a wasteful number, since it uses less digits than its factorization.

7138837563681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825920.

The product of its digits is 121927680, while the sum is 66.

The spelling of 7138837563681 in words is "seven trillion, one hundred thirty-eight billion, eight hundred thirty-seven million, five hundred sixty-three thousand, six hundred eighty-one".