7378426525581 has 14 divisors (see below), whose sum is σ = 11062579140270. Its totient is φ = 4918951016568.

The previous prime is 7378426525579. The next prime is 7378426525637. The reversal of 7378426525581 is 1855256248737.

7378426525581 is a `hidden beast` number, since 7 + 3 + 7 + 8 + 4 + 26 + 5 + 25 + 581 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5172399552681 + 2206026972900 = 2274291^2 + 1485270^2 .

It is not a de Polignac number, because 7378426525581 - 2¹ = 7378426525579 is a prime.

It is a super-2 number, since 2×7378426525581² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7378426525531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 5060648466 + ... + 5060649923.

It is an arithmetic number, because the mean of its divisors is an integer number (790184224305).

Almost surely, 2^{7378426525581} is an apocalyptic number.

It is an amenable number.

7378426525581 is a deficient number, since it is larger than the sum of its proper divisors (3684152614689).

7378426525581 is an equidigital number, since it uses as much as digits as its factorization.

7378426525581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10121298407 (or 10121298392 counting only the distinct ones).

The product of its digits is 112896000, while the sum is 63.

The spelling of 7378426525581 in words is "seven trillion, three hundred seventy-eight billion, four hundred twenty-six million, five hundred twenty-five thousand, five hundred eighty-one".