3761819290681 has 3 divisors (see below), whose sum is σ = 3761821230223. Its totient is φ = 3761817351140.

The previous prime is 3761819290673. The next prime is 3761819290721. The reversal of 3761819290681 is 1860929181673.

The square root of 3761819290681 is 1939541.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 3598263754281 + 163555536400 = 1896909^2 + 404420^2 .

It is not a de Polignac number, because 3761819290681 - 2³ = 3761819290673 is a prime.

It is a super-2 number, since 2×3761819290681² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3761819890681) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 969771 + ... + 2909311.

Almost surely, 2^{3761819290681} is an apocalyptic number.

3761819290681 is the 1939541-st square number.

3761819290681 is the 969771-st centered octagonal number.

It is an amenable number.

3761819290681 is a deficient number, since it is larger than the sum of its proper divisors (1939542).

3761819290681 is an frugal number, since it uses more digits than its factorization.

3761819290681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3879082 (or 1939541 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 61.

The spelling of 3761819290681 in words is "three trillion, seven hundred sixty-one billion, eight hundred nineteen million, two hundred ninety thousand, six hundred eighty-one".