5511406621 has 16 divisors (see below), whose sum is σ = 6449580544. Its totient is φ = 4611088944.

The previous prime is 5511406603. The next prime is 5511406631. The reversal of 5511406621 is 1266041155.

It is not a de Polignac number, because 5511406621 - 2¹⁵ = 5511373853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5511406601) 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, 513310 + ... + 523936.

It is an arithmetic number, because the mean of its divisors is an integer number (403098784).

Almost surely, 2^5511406621 is an apocalyptic number.

It is an amenable number.

5511406621 is a deficient number, since it is larger than the sum of its proper divisors (938173923).

5511406621 is a wasteful number, since it uses less digits than its factorization.

5511406621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12400.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 5511406621 is about 74238.8484622438. The cubic root of 5511406621 is about 1766.3936082350.

Adding to 5511406621 its reverse (1266041155), we get a palindrome (6777447776).

The spelling of 5511406621 in words is "five billion, five hundred eleven million, four hundred six thousand, six hundred twenty-one".