1016644625551 has 12 divisors (see below), whose sum is σ = 1069614051520. Its totient is φ = 965286354240.

The previous prime is 1016644625531. The next prime is 1016644625573. The reversal of 1016644625551 is 1555264466101.

It is not a de Polignac number, because 1016644625551 - 2⁵ = 1016644625519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1016644625531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5750406 + ... + 5924563.

Almost surely, 2^{1016644625551} is an apocalyptic number.

1016644625551 is a deficient number, since it is larger than the sum of its proper divisors (52969425969).

1016644625551 is an equidigital number, since it uses as much as digits as its factorization.

1016644625551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11675106 (or 11675053 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 46.

The spelling of 1016644625551 in words is "one trillion, sixteen billion, six hundred forty-four million, six hundred twenty-five thousand, five hundred fifty-one".