7661808552500 has 30 divisors (see below), whose sum is σ = 16754842948074. Its totient is φ = 3064723420000.

The previous prime is 7661808552469. The next prime is 7661808552533. The reversal of 7661808552500 is 52558081667.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 5631878892964 + 2029929659536 = 2373158^2 + 1424756^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1532359211 + ... + 1532364210.

Almost surely, 2^{7661808552500} is an apocalyptic number.

It is an amenable number.

7661808552500 is an abundant number, since it is smaller than the sum of its proper divisors (9093034395574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7661808552500 is a wasteful number, since it uses less digits than its factorization.

7661808552500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064723445 (or 3064723428 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 53.

The spelling of 7661808552500 in words is "seven trillion, six hundred sixty-one billion, eight hundred eight million, five hundred fifty-two thousand, five hundred".