37755987481 has 3 divisors (see below), whose sum is σ = 37756181791. Its totient is φ = 37755793172.

The previous prime is 37755987439. The next prime is 37755987527. The reversal of 37755987481 is 18478955773.

The square root of 37755987481 is 194309.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 30797091081 + 6958896400 = 175491^2 + 83420^2 .

It is not a de Polignac number, because 37755987481 - 2¹⁷ = 37755856409 is a prime.

It is a super-2 number, since 2×37755987481² (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 (37755985481) 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 2 ways as a sum of consecutive naturals, for example, 97155 + ... + 291463.

Almost surely, 2^37755987481 is an apocalyptic number.

37755987481 is the 194309-th square number.

37755987481 is the 97155-th centered octagonal number.

It is an amenable number.

37755987481 is a deficient number, since it is larger than the sum of its proper divisors (194310).

37755987481 is an frugal number, since it uses more digits than its factorization.

37755987481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388618 (or 194309 counting only the distinct ones).

The product of its digits is 59270400, while the sum is 64.

Multiplying 37755987481 by its sum of digits (64), we get a square (2416383198784 = 1554472²).

The spelling of 37755987481 in words is "thirty-seven billion, seven hundred fifty-five million, nine hundred eighty-seven thousand, four hundred eighty-one".