16267844478640 has 40 divisors (see below), whose sum is σ = 37825090208928. Its totient is φ = 6506733181440.

The previous prime is 16267844478631. The next prime is 16267844478643. The reversal of 16267844478640 is 4687444876261.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (16267844478643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5025741 + ... + 7602220.

Almost surely, 2^{16267844478640} is an apocalyptic number.

16267844478640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16267844478640 is an abundant number, since it is smaller than the sum of its proper divisors (21557245730288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16267844478640 is a wasteful number, since it uses less digits than its factorization.

16267844478640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12644077 (or 12644071 counting only the distinct ones).

The product of its (nonzero) digits is 346816512, while the sum is 67.

The spelling of 16267844478640 in words is "sixteen trillion, two hundred sixty-seven billion, eight hundred forty-four million, four hundred seventy-eight thousand, six hundred forty".