5540451638 has 4 divisors (see below), whose sum is σ = 8310677460. Its totient is φ = 2770225818.

The previous prime is 5540451613. The next prime is 5540451673. The reversal of 5540451638 is 8361540455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8361540455 = 5 ⋅1672308091.

It is a junction number, because it is equal to n+sod(n) for n = 5540451595 and 5540451604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1385112908 + ... + 1385112911.

It is an arithmetic number, because the mean of its divisors is an integer number (2077669365).

Almost surely, 2^5540451638 is an apocalyptic number.

5540451638 is a deficient number, since it is larger than the sum of its proper divisors (2770225822).

5540451638 is a wasteful number, since it uses less digits than its factorization.

5540451638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770225821.

The product of its (nonzero) digits is 288000, while the sum is 41.

The square root of 5540451638 is about 74434.2101321697. The cubic root of 5540451638 is about 1769.4911278265.

The spelling of 5540451638 in words is "five billion, five hundred forty million, four hundred fifty-one thousand, six hundred thirty-eight".