16215465823 has 2 divisors, whose sum is σ = 16215465824. Its totient is φ = 16215465822.

The previous prime is 16215465809. The next prime is 16215465881. The reversal of 16215465823 is 32856451261.

It is a weak prime.

It is an emirp because it is prime and its reverse (32856451261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16215465823 - 2²¹ = 16213368671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16215465823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16215465023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8107732911 + 8107732912.

It is an arithmetic number, because the mean of its divisors is an integer number (8107732912).

Almost surely, 2^16215465823 is an apocalyptic number.

16215465823 is a deficient number, since it is larger than the sum of its proper divisors (1).

16215465823 is an equidigital number, since it uses as much as digits as its factorization.

16215465823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 43.

The spelling of 16215465823 in words is "sixteen billion, two hundred fifteen million, four hundred sixty-five thousand, eight hundred twenty-three".