6506240745081 has 48 divisors (see below), whose sum is σ = 11082588523200. Its totient is φ = 3357181537920.

The previous prime is 6506240745079. The next prime is 6506240745157. The reversal of 6506240745081 is 1805470426056.

It is not a de Polignac number, because 6506240745081 - 2¹ = 6506240745079 is a prime.

It is a super-2 number, since 2×6506240745081² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6506240745081.

It is not an unprimeable number, because it can be changed into a prime (6506240745071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13261246 + ... + 13743111.

It is an arithmetic number, because the mean of its divisors is an integer number (230887260900).

Almost surely, 2^{6506240745081} is an apocalyptic number.

It is an amenable number.

6506240745081 is a deficient number, since it is larger than the sum of its proper divisors (4576347778119).

6506240745081 is a wasteful number, since it uses less digits than its factorization.

6506240745081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27004534 (or 27004527 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 6506240745081 in words is "six trillion, five hundred six billion, two hundred forty million, seven hundred forty-five thousand, eighty-one".