550688155440 has 80 divisors (see below), whose sum is σ = 1781356485888. Its totient is φ = 140465383168.

The previous prime is 550688155439. The next prime is 550688155447. The reversal of 550688155440 is 44551886055.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (550688155447) 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, 49875654 + ... + 49886693.

Almost surely, 2^550688155440 is an apocalyptic number.

It is an amenable number.

550688155440 is an abundant number, since it is smaller than the sum of its proper divisors (1230668330448).

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

550688155440 is a wasteful number, since it uses less digits than its factorization.

550688155440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99762386 (or 99762380 counting only the distinct ones).

The product of its (nonzero) digits is 3840000, while the sum is 51.

The spelling of 550688155440 in words is "five hundred fifty billion, six hundred eighty-eight million, one hundred fifty-five thousand, four hundred forty".