5521521642 has 128 divisors (see below), whose sum is σ = 14195865600. Its totient is φ = 1392443136.

The previous prime is 5521521617. The next prime is 5521521727. The reversal of 5521521642 is 2461251255.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1692609 + ... + 1695867.

It is an arithmetic number, because the mean of its divisors is an integer number (110905200).

Almost surely, 2^5521521642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5521521642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7097932800).

5521521642 is an abundant number, since it is smaller than the sum of its proper divisors (8674343958).

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

5521521642 is a wasteful number, since it uses less digits than its factorization.

5521521642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420.

The product of its digits is 24000, while the sum is 33.

The square root of 5521521642 is about 74306.9420848416. The cubic root of 5521521642 is about 1767.4735617670.

Adding to 5521521642 its reverse (2461251255), we get a palindrome (7982772897).

The spelling of 5521521642 in words is "five billion, five hundred twenty-one million, five hundred twenty-one thousand, six hundred forty-two".