7520779980 has 288 divisors, whose sum is σ = 26913030144. Its totient is φ = 1664312832.

The previous prime is 7520779979. The next prime is 7520779997. The reversal of 7520779980 is 899770257.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6880314 + ... + 6881406.

Almost surely, 2^7520779980 is an apocalyptic number.

7520779980 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7520779980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13456515072).

7520779980 is an abundant number, since it is smaller than the sum of its proper divisors (19392250164).

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

7520779980 is a wasteful number, since it uses less digits than its factorization.

7520779980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285 (or 1280 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 54.

The square root of 7520779980 is about 86722.4306624301. The cubic root of 7520779980 is about 1959.2399506898.

The spelling of 7520779980 in words is "seven billion, five hundred twenty million, seven hundred seventy-nine thousand, nine hundred eighty".