7378085581 has 4 divisors (see below), whose sum is σ = 7379627164. Its totient is φ = 7376544000.

The previous prime is 7378085563. The next prime is 7378085599. The reversal of 7378085581 is 1855808737.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1855808737 = 2927 ⋅634031.

It is an interprime number because it is at equal distance from previous prime (7378085563) and next prime (7378085599).

It can be written as a sum of positive squares in 2 ways, for example, as 2749324356 + 4628761225 = 52434^2 + 68035^2 .

It is a cyclic number.

It is not a de Polignac number, because 7378085581 - 2⁵ = 7378085549 is a prime.

It is a super-2 number, since 2×7378085581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7378085501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 763590 + ... + 773191.

It is an arithmetic number, because the mean of its divisors is an integer number (1844906791).

Almost surely, 2^7378085581 is an apocalyptic number.

It is an amenable number.

7378085581 is a deficient number, since it is larger than the sum of its proper divisors (1541583).

7378085581 is a wasteful number, since it uses less digits than its factorization.

7378085581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541582.

The product of its (nonzero) digits is 1881600, while the sum is 52.

The square root of 7378085581 is about 85895.7832550586. The cubic root of 7378085581 is about 1946.7696312345.

The spelling of 7378085581 in words is "seven billion, three hundred seventy-eight million, eighty-five thousand, five hundred eighty-one".