7121478528 has 224 divisors, whose sum is σ = 21445446960. Its totient is φ = 2354448384.

The previous prime is 7121478479. The next prime is 7121478547. The reversal of 7121478528 is 8258741217.

7121478528 is a `hidden beast` number, since 7 + 121 + 478 + 52 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 15582876 + ... + 15583332.

Almost surely, 2^7121478528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7121478528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10722723480).

7121478528 is an abundant number, since it is smaller than the sum of its proper divisors (14323968432).

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

7121478528 is an equidigital number, since it uses as much as digits as its factorization.

7121478528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 629 counting only the distinct ones).

The product of its digits is 250880, while the sum is 45.

The square root of 7121478528 is about 84388.8531027647. The cubic root of 7121478528 is about 1923.9334984499.

The spelling of 7121478528 in words is "seven billion, one hundred twenty-one million, four hundred seventy-eight thousand, five hundred twenty-eight".