6506642561615 has 128 divisors (see below), whose sum is σ = 9641919006720. Its totient is φ = 4114271895552.

The previous prime is 6506642561603. The next prime is 6506642561677. The reversal of 6506642561615 is 5161652466056.

It is not a de Polignac number, because 6506642561615 - 2¹⁰ = 6506642560591 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2781804116 + ... + 2781806454.

It is an arithmetic number, because the mean of its divisors is an integer number (75327492240).

Almost surely, 2^{6506642561615} is an apocalyptic number.

6506642561615 is a deficient number, since it is larger than the sum of its proper divisors (3135276445105).

6506642561615 is a wasteful number, since it uses less digits than its factorization.

6506642561615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2929.

The product of its (nonzero) digits is 7776000, while the sum is 53.

The spelling of 6506642561615 in words is "six trillion, five hundred six billion, six hundred forty-two million, five hundred sixty-one thousand, six hundred fifteen".