6515138395428 has 48 divisors (see below), whose sum is σ = 17233024643520. Its totient is φ = 1899149652864.

The previous prime is 6515138395417. The next prime is 6515138395429. The reversal of 6515138395428 is 8245938315156.

It is not an unprimeable number, because it can be changed into a prime (6515138395429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1099041975 + ... + 1099047902.

It is an arithmetic number, because the mean of its divisors is an integer number (359021346740).

Almost surely, 2^{6515138395428} is an apocalyptic number.

It is an amenable number.

6515138395428 is an abundant number, since it is smaller than the sum of its proper divisors (10717886248092).

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

6515138395428 is a wasteful number, since it uses less digits than its factorization.

6515138395428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198089916 (or 2198089914 counting only the distinct ones).

The product of its digits is 31104000, while the sum is 60.

The spelling of 6515138395428 in words is "six trillion, five hundred fifteen billion, one hundred thirty-eight million, three hundred ninety-five thousand, four hundred twenty-eight".