6415729369540 has 12 divisors (see below), whose sum is σ = 13473031676076. Its totient is φ = 2566291747808.

The previous prime is 6415729369519. The next prime is 6415729369591. The reversal of 6415729369540 is 459639275146.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1760759148096 + 4654970221444 = 1326936^2 + 2157538^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160393234219 + ... + 160393234258.

It is an arithmetic number, because the mean of its divisors is an integer number (1122752639673).

Almost surely, 2^{6415729369540} is an apocalyptic number.

It is an amenable number.

6415729369540 is an abundant number, since it is smaller than the sum of its proper divisors (7057302306536).

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

6415729369540 is a wasteful number, since it uses less digits than its factorization.

6415729369540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320786468486 (or 320786468484 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 61.

The spelling of 6415729369540 in words is "six trillion, four hundred fifteen billion, seven hundred twenty-nine million, three hundred sixty-nine thousand, five hundred forty".