16281121461 has 32 divisors (see below), whose sum is σ = 24195024000. Its totient is φ = 9655726080.

The previous prime is 16281121457. The next prime is 16281121529. The reversal of 16281121461 is 16412118261.

It is not a de Polignac number, because 16281121461 - 2² = 16281121457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16281121411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 256315 + ... + 313463.

It is an arithmetic number, because the mean of its divisors is an integer number (756094500).

Almost surely, 2^16281121461 is an apocalyptic number.

16281121461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16281121461 is a deficient number, since it is larger than the sum of its proper divisors (7913902539).

16281121461 is a wasteful number, since it uses less digits than its factorization.

16281121461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57349.

The product of its digits is 4608, while the sum is 33.

The spelling of 16281121461 in words is "sixteen billion, two hundred eighty-one million, one hundred twenty-one thousand, four hundred sixty-one".