6511101016551 has 4 divisors (see below), whose sum is σ = 8681468022072. Its totient is φ = 4340734011032.

The previous prime is 6511101016549. The next prime is 6511101016559. The reversal of 6511101016551 is 1556101011156.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6511101016551 - 2¹ = 6511101016549 is a prime.

It is a super-3 number, since 3×6511101016551³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6511101016559) 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, 1085183502756 + ... + 1085183502761.

It is an arithmetic number, because the mean of its divisors is an integer number (2170367005518).

Almost surely, 2^{6511101016551} is an apocalyptic number.

6511101016551 is a deficient number, since it is larger than the sum of its proper divisors (2170367005521).

6511101016551 is a wasteful number, since it uses less digits than its factorization.

6511101016551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170367005520.

The product of its (nonzero) digits is 4500, while the sum is 33.

It can be divided in two parts, 651110 and 1016551, that added together give a palindrome (1667661).

The spelling of 6511101016551 in words is "six trillion, five hundred eleven billion, one hundred one million, sixteen thousand, five hundred fifty-one".