16261949487 has 8 divisors (see below), whose sum is σ = 24780113536. Its totient is φ = 9292542552.

The previous prime is 16261949447. The next prime is 16261949497. The reversal of 16261949487 is 78494916261.

16261949487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 16261949487 - 2¹⁰ = 16261948463 is a prime.

It is a super-2 number, since 2×16261949487² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16261949447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387189253 + ... + 387189294.

It is an arithmetic number, because the mean of its divisors is an integer number (3097514192).

Almost surely, 2^16261949487 is an apocalyptic number.

16261949487 is a deficient number, since it is larger than the sum of its proper divisors (8518164049).

16261949487 is an equidigital number, since it uses as much as digits as its factorization.

16261949487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774378557.

The product of its digits is 5225472, while the sum is 57.

The spelling of 16261949487 in words is "sixteen billion, two hundred sixty-one million, nine hundred forty-nine thousand, four hundred eighty-seven".