16445052261 has 12 divisors (see below), whose sum is σ = 25913415840. Its totient is φ = 9966698280.

The previous prime is 16445052259. The next prime is 16445052269. The reversal of 16445052261 is 16225054461.

16445052261 is a `hidden beast` number, since 1 + 644 + 5 + 0 + 5 + 2 + 2 + 6 + 1 = 666.

It is not a de Polignac number, because 16445052261 - 2¹ = 16445052259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16445052269) 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, 83055721 + ... + 83055918.

It is an arithmetic number, because the mean of its divisors is an integer number (2159451320).

Almost surely, 2^16445052261 is an apocalyptic number.

16445052261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16445052261 is a deficient number, since it is larger than the sum of its proper divisors (9468363579).

16445052261 is a wasteful number, since it uses less digits than its factorization.

16445052261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166111656 (or 166111653 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 16445052261 in words is "sixteen billion, four hundred forty-five million, fifty-two thousand, two hundred sixty-one".