4021797615364 has 9 divisors (see below), whose sum is σ = 7038152845941. Its totient is φ = 2010896802240.

The previous prime is 4021797615347. The next prime is 4021797615371. The reversal of 4021797615364 is 4635167971204.

The square root of 4021797615364 is 2005442.

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

It can be written as a sum of positive squares in only one way, i.e., 1524133455364 + 2497664160000 = 1234558^2 + 1580400^2 .

It is a super-3 number, since 3×4021797615364³ (a number of 39 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3509524 + ... + 4512244.

Almost surely, 2^{4021797615364} is an apocalyptic number.

4021797615364 is the 2005442-nd square number.

It is an amenable number.

4021797615364 is a deficient number, since it is larger than the sum of its proper divisors (3016355230577).

4021797615364 is an frugal number, since it uses more digits than its factorization.

4021797615364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005446 (or 1002723 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 4021797615364 in words is "four trillion, twenty-one billion, seven hundred ninety-seven million, six hundred fifteen thousand, three hundred sixty-four".