7128618520 has 32 divisors (see below), whose sum is σ = 16050312000. Its totient is φ = 2849506048.

The previous prime is 7128618503. The next prime is 7128618527. The reversal of 7128618520 is 258168217.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7128618527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445 + ... + 119404.

It is an arithmetic number, because the mean of its divisors is an integer number (501572250).

Almost surely, 2^7128618520 is an apocalyptic number.

It is an amenable number.

7128618520 is an abundant number, since it is smaller than the sum of its proper divisors (8921693480).

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

7128618520 is a wasteful number, since it uses less digits than its factorization.

7128618520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121347 (or 121343 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 7128618520 is about 84431.1466225587. The cubic root of 7128618520 is about 1924.5762620478.

The spelling of 7128618520 in words is "seven billion, one hundred twenty-eight million, six hundred eighteen thousand, five hundred twenty".