16261321655 has 8 divisors (see below), whose sum is σ = 20362002912. Its totient is φ = 12443446048.

The previous prime is 16261321621. The next prime is 16261321679. The reversal of 16261321655 is 55612316261.

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 16261321655 - 2¹⁰ = 16261320631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70701284 + ... + 70701513.

It is an arithmetic number, because the mean of its divisors is an integer number (2545250364).

Almost surely, 2^16261321655 is an apocalyptic number.

16261321655 is a deficient number, since it is larger than the sum of its proper divisors (4100681257).

16261321655 is a wasteful number, since it uses less digits than its factorization.

16261321655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141402825.

The product of its digits is 64800, while the sum is 38.

The spelling of 16261321655 in words is "sixteen billion, two hundred sixty-one million, three hundred twenty-one thousand, six hundred fifty-five".