6355502640 has 120 divisors (see below), whose sum is σ = 21636457440. Its totient is φ = 1671570432.

The previous prime is 6355502551. The next prime is 6355502651. The reversal of 6355502640 is 462055536.

It is a happy number.

6355502640 is a `hidden beast` number, since 6 + 3 + 5 + 5 + 5 + 0 + 2 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

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 = 6355502595 and 6355502604.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7900 + ... + 113019.

It is an arithmetic number, because the mean of its divisors is an integer number (180303812).

Almost surely, 2^6355502640 is an apocalyptic number.

6355502640 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 6355502640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10818228720).

6355502640 is an abundant number, since it is smaller than the sum of its proper divisors (15280954800).

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

6355502640 is a wasteful number, since it uses less digits than its factorization.

6355502640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121011 (or 121002 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The square root of 6355502640 is about 79721.4064100728. The cubic root of 6355502640 is about 1852.3226381470.

The spelling of 6355502640 in words is "six billion, three hundred fifty-five million, five hundred two thousand, six hundred forty".