445541111551 has 16 divisors (see below), whose sum is σ = 469198552320. Its totient is φ = 422485090560.

The previous prime is 445541111537. The next prime is 445541111567. The reversal of 445541111551 is 155111145544.

It is a cyclic number.

It is not a de Polignac number, because 445541111551 - 2⁷ = 445541111423 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 445541111551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445541111501) 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, 1094635 + ... + 1445443.

It is an arithmetic number, because the mean of its divisors is an integer number (29324909520).

Almost surely, 2^445541111551 is an apocalyptic number.

445541111551 is a deficient number, since it is larger than the sum of its proper divisors (23657440769).

445541111551 is a wasteful number, since it uses less digits than its factorization.

445541111551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351666.

The product of its digits is 40000, while the sum is 37.

The spelling of 445541111551 in words is "four hundred forty-five billion, five hundred forty-one million, one hundred eleven thousand, five hundred fifty-one".