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16043121643 = 314571132429
BaseRepresentation
bin11101111000011111…
…01001101111101011
31112102001222000120111
432330033221233223
5230324014343033
611211535435151
71105364166253
oct167417515753
945361860514
1016043121643
116892a1881a
123138985ab7
1316889a38b3
14ac2998963
1563d6b27cd
hex3bc3e9beb

16043121643 has 8 divisors (see below), whose sum is σ = 16596894080. Its totient is φ = 15491615040.

The previous prime is 16043121641. The next prime is 16043121649. The reversal of 16043121643 is 34612134061.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16043121643 - 21 = 16043121641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (16043121641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552048 + ... + 580381.

It is an arithmetic number, because the mean of its divisors is an integer number (2074611760).

Almost surely, 216043121643 is an apocalyptic number.

16043121643 is a deficient number, since it is larger than the sum of its proper divisors (553772437).

16043121643 is a wasteful number, since it uses less digits than its factorization.

16043121643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132917.

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 16043121643 in words is "sixteen billion, forty-three million, one hundred twenty-one thousand, six hundred forty-three".

Divisors: 1 31 457 14167 1132429 35105299 517520053 16043121643