5540355621 has 48 divisors (see below), whose sum is σ = 8470230912. Its totient is φ = 3482793600.

The previous prime is 5540355593. The next prime is 5540355637. The reversal of 5540355621 is 1265530455.

5540355621 is a `hidden beast` number, since 5 + 540 + 3 + 55 + 62 + 1 = 666.

It is not a de Polignac number, because 5540355621 - 2²⁵ = 5506801189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5540355661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4690651 + ... + 4691831.

It is an arithmetic number, because the mean of its divisors is an integer number (176463144).

Almost surely, 2^5540355621 is an apocalyptic number.

It is an amenable number.

5540355621 is a deficient number, since it is larger than the sum of its proper divisors (2929875291).

5540355621 is a wasteful number, since it uses less digits than its factorization.

5540355621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514 (or 1511 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 5540355621 is about 74433.5651504078. The cubic root of 5540355621 is about 1769.4809059034.

The spelling of 5540355621 in words is "five billion, five hundred forty million, three hundred fifty-five thousand, six hundred twenty-one".