7111664328550 has 24 divisors (see below), whose sum is σ = 13395134844000. Its totient is φ = 2808657302880.

The previous prime is 7111664328523. The next prime is 7111664328551. The reversal of 7111664328550 is 558234661117.

It is a junction number, because it is equal to n+sod(n) for n = 7111664328494 and 7111664328503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7111664328551) 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, 900206725 + ... + 900214624.

It is an arithmetic number, because the mean of its divisors is an integer number (558130618500).

Almost surely, 2^{7111664328550} is an apocalyptic number.

7111664328550 is a deficient number, since it is larger than the sum of its proper divisors (6283470515450).

7111664328550 is a wasteful number, since it uses less digits than its factorization.

7111664328550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800421440 (or 1800421435 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 49.

Adding to 7111664328550 its reverse (558234661117), we get a palindrome (7669898989667).

The spelling of 7111664328550 in words is "seven trillion, one hundred eleven billion, six hundred sixty-four million, three hundred twenty-eight thousand, five hundred fifty".