5515556640 has 96 divisors (see below), whose sum is σ = 18953476416. Its totient is φ = 1337103360.

The previous prime is 5515556623. The next prime is 5515556729. The reversal of 5515556640 is 466555155.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 5515556592 and 5515556601.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517027 + ... + 527586.

It is an arithmetic number, because the mean of its divisors is an integer number (197432046).

Almost surely, 2^5515556640 is an apocalyptic number.

It is an amenable number.

5515556640 is an abundant number, since it is smaller than the sum of its proper divisors (13437919776).

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

5515556640 is a wasteful number, since it uses less digits than its factorization.

5515556640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044642 (or 1044634 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 42.

The square root of 5515556640 is about 74266.7936563845. The cubic root of 5515556640 is about 1766.8368542983.

The spelling of 5515556640 in words is "five billion, five hundred fifteen million, five hundred fifty-six thousand, six hundred forty".