16261021715 has 8 divisors (see below), whose sum is σ = 19706426928. Its totient is φ = 12880016800.

The previous prime is 16261021709. The next prime is 16261021717. The reversal of 16261021715 is 51712016261.

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

It is not a de Polignac number, because 16261021715 - 2¹⁴ = 16261005331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16261021717) 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, 16099517 + ... + 16100526.

It is an arithmetic number, because the mean of its divisors is an integer number (2463303366).

Almost surely, 2^16261021715 is an apocalyptic number.

16261021715 is a deficient number, since it is larger than the sum of its proper divisors (3445405213).

16261021715 is a wasteful number, since it uses less digits than its factorization.

16261021715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32200149.

The product of its (nonzero) digits is 5040, while the sum is 32.

Adding to 16261021715 its reverse (51712016261), we get a palindrome (67973037976).

The spelling of 16261021715 in words is "sixteen billion, two hundred sixty-one million, twenty-one thousand, seven hundred fifteen".