216415236407 has 4 divisors (see below), whose sum is σ = 216736805040. Its totient is φ = 216093667776.

The previous prime is 216415236377. The next prime is 216415236487. The reversal of 216415236407 is 704632514612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216415236407 - 2¹⁸ = 216414974263 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 (216415236487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160783307 + ... + 160784652.

It is an arithmetic number, because the mean of its divisors is an integer number (54184201260).

Almost surely, 2^216415236407 is an apocalyptic number.

216415236407 is a deficient number, since it is larger than the sum of its proper divisors (321568633).

216415236407 is an equidigital number, since it uses as much as digits as its factorization.

216415236407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321568632.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 216415236407 in words is "two hundred sixteen billion, four hundred fifteen million, two hundred thirty-six thousand, four hundred seven".