216896906523 has 16 divisors (see below), whose sum is σ = 315585430272. Its totient is φ = 131411412000.

The previous prime is 216896906519. The next prime is 216896906533. The reversal of 216896906523 is 325609698612.

It is not a de Polignac number, because 216896906523 - 2² = 216896906519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216896906533) 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, 924568 + ... + 1135173.

It is an arithmetic number, because the mean of its divisors is an integer number (19724089392).

Almost surely, 2^216896906523 is an apocalyptic number.

216896906523 is a deficient number, since it is larger than the sum of its proper divisors (98688523749).

216896906523 is a wasteful number, since it uses less digits than its factorization.

216896906523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062946.

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 216896906523 in words is "two hundred sixteen billion, eight hundred ninety-six million, nine hundred six thousand, five hundred twenty-three".