7199720640 has 392 divisors, whose sum is σ = 29383512480. Its totient is φ = 1645277184.

The previous prime is 7199720629. The next prime is 7199720653. The reversal of 7199720640 is 460279917.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1630756 + ... + 1635164.

It is an arithmetic number, because the mean of its divisors is an integer number (74957940).

Almost surely, 2^7199720640 is an apocalyptic number.

7199720640 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 7199720640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14691756240).

7199720640 is an abundant number, since it is smaller than the sum of its proper divisors (22183791840).

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

7199720640 is an equidigital number, since it uses as much as digits as its factorization.

7199720640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4451 (or 4426 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 7199720640 is about 84851.1675818312. The cubic root of 7199720640 is about 1930.9537948962.

The spelling of 7199720640 in words is "seven billion, one hundred ninety-nine million, seven hundred twenty thousand, six hundred forty".