6446103526551 has 16 divisors (see below), whose sum is σ = 9263574214496. Its totient is φ = 3963562644096.

The previous prime is 6446103526531. The next prime is 6446103526633. The reversal of 6446103526551 is 1556253016446.

It is a happy number.

It is not a de Polignac number, because 6446103526551 - 2¹⁵ = 6446103493783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6446103526551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446103526501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68083240 + ... + 68177853.

It is an arithmetic number, because the mean of its divisors is an integer number (578973388406).

Almost surely, 2^{6446103526551} is an apocalyptic number.

6446103526551 is a deficient number, since it is larger than the sum of its proper divisors (2817470687945).

6446103526551 is a wasteful number, since it uses less digits than its factorization.

6446103526551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136262322.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 6446103526551 in words is "six trillion, four hundred forty-six billion, one hundred three million, five hundred twenty-six thousand, five hundred fifty-one".