6551011565656 has 8 divisors (see below), whose sum is σ = 12283146685620. Its totient is φ = 3275505782824.

The previous prime is 6551011565639. The next prime is 6551011565663. The reversal of 6551011565656 is 6565651101556.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409438222846 + ... + 409438222861.

Almost surely, 2^{6551011565656} is an apocalyptic number.

It is an amenable number.

6551011565656 is a deficient number, since it is larger than the sum of its proper divisors (5732135119964).

6551011565656 is a wasteful number, since it uses less digits than its factorization.

6551011565656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818876445713 (or 818876445709 counting only the distinct ones).

The product of its (nonzero) digits is 4050000, while the sum is 52.

The spelling of 6551011565656 in words is "six trillion, five hundred fifty-one billion, eleven million, five hundred sixty-five thousand, six hundred fifty-six".