16261270421 has 8 divisors (see below), whose sum is σ = 17751420000. Its totient is φ = 14773096240.

The previous prime is 16261270351. The next prime is 16261270451. The reversal of 16261270421 is 12407216261.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16261270421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16261270451) 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, 476606 + ... + 509583.

It is an arithmetic number, because the mean of its divisors is an integer number (2218927500).

Almost surely, 2^16261270421 is an apocalyptic number.

16261270421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16261270421 is a deficient number, since it is larger than the sum of its proper divisors (1490149579).

16261270421 is a wasteful number, since it uses less digits than its factorization.

16261270421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987699.

The product of its (nonzero) digits is 8064, while the sum is 32.

Adding to 16261270421 its reverse (12407216261), we get a palindrome (28668486682).

It can be divided in two parts, 16261 and 270421, that added together give a palindrome (286682).

The spelling of 16261270421 in words is "sixteen billion, two hundred sixty-one million, two hundred seventy thousand, four hundred twenty-one".