7121309760 has 84 divisors (see below), whose sum is σ = 24494348268. Its totient is φ = 1899015168.

The previous prime is 7121309759. The next prime is 7121309773. The reversal of 7121309760 is 679031217.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2900468736 + 4220841024 = 53856^2 + 64968^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1233459 + ... + 1239218.

Almost surely, 2^7121309760 is an apocalyptic number.

It is an amenable number.

7121309760 is an abundant number, since it is smaller than the sum of its proper divisors (17373038508).

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

7121309760 is a wasteful number, since it uses less digits than its factorization.

7121309760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472700 (or 2472687 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 7121309760 is about 84387.8531543492. The cubic root of 7121309760 is about 1923.9183002495.

The spelling of 7121309760 in words is "seven billion, one hundred twenty-one million, three hundred nine thousand, seven hundred sixty".