16215411451261 has 16 divisors (see below), whose sum is σ = 18312294490560. Its totient is φ = 14223030344320.

The previous prime is 16215411451229. The next prime is 16215411451453.

16215411451261 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 16215411451261 - 2⁵ = 16215411451229 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 (16215411451961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17279095 + ... + 18193348.

It is an arithmetic number, because the mean of its divisors is an integer number (1144518405660).

Almost surely, 2^{16215411451261} is an apocalyptic number.

16215411451261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16215411451261 is a deficient number, since it is larger than the sum of its proper divisors (2096883039299).

16215411451261 is a wasteful number, since it uses less digits than its factorization.

16215411451261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35473916.

The product of its digits is 57600, while the sum is 40.

The spelling of 16215411451261 in words is "sixteen trillion, two hundred fifteen billion, four hundred eleven million, four hundred fifty-one thousand, two hundred sixty-one".