3556021642 has 4 divisors (see below), whose sum is σ = 5334032466. Its totient is φ = 1778010820.

The previous prime is 3556021619. The next prime is 3556021643. The reversal of 3556021642 is 2461206553.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3416285601 + 139736041 = 58449^2 + 11821^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3556021598 and 3556021607.

It is not an unprimeable number, because it can be changed into a prime (3556021643) by changing a digit.

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, 889005409 + ... + 889005412.

Almost surely, 2^3556021642 is an apocalyptic number.

3556021642 is a deficient number, since it is larger than the sum of its proper divisors (1778010824).

3556021642 is a wasteful number, since it uses less digits than its factorization.

3556021642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778010823.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 3556021642 is about 59632.3875255720. The cubic root of 3556021642 is about 1526.3523457977.

The spelling of 3556021642 in words is "three billion, five hundred fifty-six million, twenty-one thousand, six hundred forty-two".