7423556881 has 8 divisors (see below), whose sum is σ = 7997941224. Its totient is φ = 6849649920.

The previous prime is 7423556879. The next prime is 7423556897. The reversal of 7423556881 is 1886553247.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3499787281 + 3923769600 = 59159^2 + 62640^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7423556881 - 2¹ = 7423556879 is a prime.

It is a super-2 number, since 2×7423556881² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7423556831) 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 7 ways as a sum of consecutive naturals, for example, 86710 + ... + 149551.

It is an arithmetic number, because the mean of its divisors is an integer number (999742653).

Almost surely, 2^7423556881 is an apocalyptic number.

It is an amenable number.

7423556881 is a deficient number, since it is larger than the sum of its proper divisors (574384343).

7423556881 is a wasteful number, since it uses less digits than its factorization.

7423556881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238691.

The product of its digits is 1612800, while the sum is 49.

The square root of 7423556881 is about 86160.0654653883. The cubic root of 7423556881 is about 1950.7607709613.

The spelling of 7423556881 in words is "seven billion, four hundred twenty-three million, five hundred fifty-six thousand, eight hundred eighty-one".