3638761806 has 8 divisors (see below), whose sum is σ = 7277523624. Its totient is φ = 1212920600.

The previous prime is 3638761793. The next prime is 3638761823. The reversal of 3638761806 is 6081678363.

3638761806 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

3638761806 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303230145 + ... + 303230156.

It is an arithmetic number, because the mean of its divisors is an integer number (909690453).

Almost surely, 2^3638761806 is an apocalyptic number.

3638761806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3638761806 is a wasteful number, since it uses less digits than its factorization.

3638761806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606460306.

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 3638761806 is about 60322.1502103498. The cubic root of 3638761806 is about 1538.0998949818.

The spelling of 3638761806 in words is "three billion, six hundred thirty-eight million, seven hundred sixty-one thousand, eight hundred six".