37521347881 has 4 divisors (see below), whose sum is σ = 37531983700. Its totient is φ = 37510712064.

The previous prime is 37521347879. The next prime is 37521347947. The reversal of 37521347881 is 18874312573.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20356155625 + 17165192256 = 142675^2 + 131016^2 .

It is a cyclic number.

It is not a de Polignac number, because 37521347881 - 2¹ = 37521347879 is a prime.

It is a super-2 number, since 2×37521347881² (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 (37521344881) 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, 5312616 + ... + 5319673.

It is an arithmetic number, because the mean of its divisors is an integer number (9382995925).

Almost surely, 2^37521347881 is an apocalyptic number.

It is an amenable number.

37521347881 is a deficient number, since it is larger than the sum of its proper divisors (10635819).

37521347881 is a wasteful number, since it uses less digits than its factorization.

37521347881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10635818.

The product of its digits is 1128960, while the sum is 49.

The spelling of 37521347881 in words is "thirty-seven billion, five hundred twenty-one million, three hundred forty-seven thousand, eight hundred eighty-one".