37068718681 has 4 divisors (see below), whose sum is σ = 37069532032. Its totient is φ = 37067905332.

The previous prime is 37068718639. The next prime is 37068718723. The reversal of 37068718681 is 18681786073.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18681786073 = 389 ⋅48025157.

It is an interprime number because it is at equal distance from previous prime (37068718639) and next prime (37068718723).

It is a cyclic number.

It is not a de Polignac number, because 37068718681 - 2¹⁷ = 37068587609 is a prime.

It is a super-2 number, since 2×37068718681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37068818681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333981 + ... + 430906.

It is an arithmetic number, because the mean of its divisors is an integer number (9267383008).

Almost surely, 2^37068718681 is an apocalyptic number.

It is an amenable number.

37068718681 is a deficient number, since it is larger than the sum of its proper divisors (813351).

37068718681 is an equidigital number, since it uses as much as digits as its factorization.

37068718681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813350.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 37068718681 in words is "thirty-seven billion, sixty-eight million, seven hundred eighteen thousand, six hundred eighty-one".