5651611556551 has 8 divisors (see below), whose sum is σ = 5653564366464. Its totient is φ = 5649658917240.

The previous prime is 5651611556533. The next prime is 5651611556651. The reversal of 5651611556551 is 1556551161565.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5651611556551 - 2¹¹ = 5651611554503 is a prime.

It is a super-2 number, since 2×5651611556551² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5651611556651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133817700 + ... + 133859926.

It is an arithmetic number, because the mean of its divisors is an integer number (706695545808).

Almost surely, 2^{5651611556551} is an apocalyptic number.

5651611556551 is a deficient number, since it is larger than the sum of its proper divisors (1952809913).

5651611556551 is a wasteful number, since it uses less digits than its factorization.

5651611556551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85301.

The product of its digits is 3375000, while the sum is 52.

The spelling of 5651611556551 in words is "five trillion, six hundred fifty-one billion, six hundred eleven million, five hundred fifty-six thousand, five hundred fifty-one".