37218368641 has 4 divisors (see below), whose sum is σ = 37468156500. Its totient is φ = 36968580784.

The previous prime is 37218368623. The next prime is 37218368659. The reversal of 37218368641 is 14686381273.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14686381273 = 1619 ⋅9071267.

It is an interprime number because it is at equal distance from previous prime (37218368623) and next prime (37218368659).

It can be written as a sum of positive squares in 2 ways, for example, as 24467216400 + 12751152241 = 156420^2 + 112921^2 .

It is a cyclic number.

It is not a de Polignac number, because 37218368641 - 2⁹ = 37218368129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37218368441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124893706 + ... + 124894003.

It is an arithmetic number, because the mean of its divisors is an integer number (9367039125).

Almost surely, 2^37218368641 is an apocalyptic number.

It is an amenable number.

37218368641 is a deficient number, since it is larger than the sum of its proper divisors (249787859).

37218368641 is a wasteful number, since it uses less digits than its factorization.

37218368641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249787858.

The product of its digits is 1161216, while the sum is 49.

The spelling of 37218368641 in words is "thirty-seven billion, two hundred eighteen million, three hundred sixty-eight thousand, six hundred forty-one".