6516155605556 has 12 divisors (see below), whose sum is σ = 11403313377792. Its totient is φ = 3258066069048.

The previous prime is 6516155605541. The next prime is 6516155605559. The reversal of 6516155605556 is 6555065516156.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6516155605559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1618430 + ... + 3956213.

It is an arithmetic number, because the mean of its divisors is an integer number (950276114816).

Almost surely, 2^{6516155605556} is an apocalyptic number.

It is an amenable number.

6516155605556 is a deficient number, since it is larger than the sum of its proper divisors (4887157772236).

6516155605556 is a wasteful number, since it uses less digits than its factorization.

6516155605556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5866870 (or 5866868 counting only the distinct ones).

The product of its (nonzero) digits is 20250000, while the sum is 56.

The spelling of 6516155605556 in words is "six trillion, five hundred sixteen billion, one hundred fifty-five million, six hundred five thousand, five hundred fifty-six".