6485511240 has 320 divisors, whose sum is σ = 24237480960. Its totient is φ = 1544624640.

The previous prime is 6485511239. The next prime is 6485511289. The reversal of 6485511240 is 421155846.

It is a happy number.

6485511240 is a `hidden beast` number, since 6 + 485 + 51 + 124 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 6485511195 and 6485511204.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1303237 + ... + 1308203.

It is an arithmetic number, because the mean of its divisors is an integer number (75742128).

Almost surely, 2^6485511240 is an apocalyptic number.

6485511240 is a gapful number since it is divisible by the number (60) 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 6485511240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12118740480).

6485511240 is an abundant number, since it is smaller than the sum of its proper divisors (17751969720).

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

6485511240 is a wasteful number, since it uses less digits than its factorization.

6485511240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5034 (or 5021 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 6485511240 is about 80532.6718791821. The cubic root of 6485511240 is about 1864.8678940512.

The spelling of 6485511240 in words is "six billion, four hundred eighty-five million, five hundred eleven thousand, two hundred forty".