545509645550 has 24 divisors (see below), whose sum is σ = 1014893469000. Its totient is φ = 218151056480.

The previous prime is 545509645547. The next prime is 545509645559. The reversal of 545509645550 is 55546905545.

It is a junction number, because it is equal to n+sod(n) for n = 545509645492 and 545509645501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545509645559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1111025 + ... + 1524924.

It is an arithmetic number, because the mean of its divisors is an integer number (42287227875).

Almost surely, 2^545509645550 is an apocalyptic number.

545509645550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

545509645550 is a deficient number, since it is larger than the sum of its proper divisors (469383823450).

545509645550 is a wasteful number, since it uses less digits than its factorization.

545509645550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640100 (or 2640095 counting only the distinct ones).

The product of its (nonzero) digits is 13500000, while the sum is 53.

The spelling of 545509645550 in words is "five hundred forty-five billion, five hundred nine million, six hundred forty-five thousand, five hundred fifty".