37768808821 has 4 divisors (see below), whose sum is σ = 37789781644. Its totient is φ = 37747836000.

The previous prime is 37768808807. The next prime is 37768808827. The reversal of 37768808821 is 12880886773.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3933045796 + 33835763025 = 62714^2 + 183945^2 .

It is a cyclic number.

It is not a de Polignac number, because 37768808821 - 2⁵ = 37768808789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37768808827) 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 3 ways as a sum of consecutive naturals, for example, 10483710 + ... + 10487311.

It is an arithmetic number, because the mean of its divisors is an integer number (9447445411).

Almost surely, 2^37768808821 is an apocalyptic number.

It is an amenable number.

37768808821 is a deficient number, since it is larger than the sum of its proper divisors (20972823).

37768808821 is a wasteful number, since it uses less digits than its factorization.

37768808821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20972822.

The product of its (nonzero) digits is 7225344, while the sum is 58.

The spelling of 37768808821 in words is "thirty-seven billion, seven hundred sixty-eight million, eight hundred eight thousand, eight hundred twenty-one".