3723628782621 has 16 divisors (see below), whose sum is σ = 5734786575168. Its totient is φ = 2123995027200.

The previous prime is 3723628782611. The next prime is 3723628782641. The reversal of 3723628782621 is 1262878263273.

It is not a de Polignac number, because 3723628782621 - 2⁵ = 3723628782589 is a prime.

It is a super-2 number, since 2×3723628782621² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3723628782611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3318741670 + ... + 3318742791.

It is an arithmetic number, because the mean of its divisors is an integer number (358424160948).

Almost surely, 2^{3723628782621} is an apocalyptic number.

It is an amenable number.

3723628782621 is a deficient number, since it is larger than the sum of its proper divisors (2011157792547).

3723628782621 is a wasteful number, since it uses less digits than its factorization.

3723628782621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6637484492.

The product of its digits is 16257024, while the sum is 57.

The spelling of 3723628782621 in words is "three trillion, seven hundred twenty-three billion, six hundred twenty-eight million, seven hundred eighty-two thousand, six hundred twenty-one".