216978683025 has 48 divisors (see below), whose sum is σ = 386698610816. Its totient is φ = 106719275520.

The previous prime is 216978683003. The next prime is 216978683027. The reversal of 216978683025 is 520386879612.

It is not a de Polignac number, because 216978683025 - 2⁵ = 216978682993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216978683027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 931749 + ... + 1141101.

Almost surely, 2^216978683025 is an apocalyptic number.

216978683025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216978683025 is a deficient number, since it is larger than the sum of its proper divisors (169719927791).

216978683025 is a wasteful number, since it uses less digits than its factorization.

216978683025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210442 (or 210437 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 216978683025 in words is "two hundred sixteen billion, nine hundred seventy-eight million, six hundred eighty-three thousand, twenty-five".