3420021656452 has 6 divisors (see below), whose sum is σ = 5985037898798. Its totient is φ = 1710010828224.

The previous prime is 3420021656393. The next prime is 3420021656479. The reversal of 3420021656452 is 2546561200243.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3224811442176 + 195210214276 = 1795776^2 + 441826^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 427502707053 + ... + 427502707060.

Almost surely, 2^{3420021656452} is an apocalyptic number.

It is an amenable number.

3420021656452 is a deficient number, since it is larger than the sum of its proper divisors (2565016242346).

3420021656452 is a wasteful number, since it uses less digits than its factorization.

3420021656452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855005414117 (or 855005414115 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

Adding to 3420021656452 its reverse (2546561200243), we get a palindrome (5966582856695).

The spelling of 3420021656452 in words is "three trillion, four hundred twenty billion, twenty-one million, six hundred fifty-six thousand, four hundred fifty-two".