6645420053040 has 160 divisors (see below), whose sum is σ = 21841064582400. Its totient is φ = 1666764794880.

The previous prime is 6645420053039. The next prime is 6645420053087. The reversal of 6645420053040 is 403500245466.

It is a self number, because there is not a number n which added to its sum of digits gives 6645420053040.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4608351 + ... + 5876030.

It is an arithmetic number, because the mean of its divisors is an integer number (136506653640).

Almost surely, 2^{6645420053040} is an apocalyptic number.

6645420053040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6645420053040 is an abundant number, since it is smaller than the sum of its proper divisors (15195644529360).

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

6645420053040 is a wasteful number, since it uses less digits than its factorization.

6645420053040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10484555 (or 10484549 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 39.

The spelling of 6645420053040 in words is "six trillion, six hundred forty-five billion, four hundred twenty million, fifty-three thousand, forty".