216887663097 has 32 divisors (see below), whose sum is σ = 386544435200. Its totient is φ = 117412868304.

The previous prime is 216887663081. The next prime is 216887663117. The reversal of 216887663097 is 790366788612.

It is not a de Polignac number, because 216887663097 - 2⁴ = 216887663081 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (216887661097) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30195193 + ... + 30202374.

It is an arithmetic number, because the mean of its divisors is an integer number (12079513600).

Almost surely, 2^216887663097 is an apocalyptic number.

216887663097 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

216887663097 is a deficient number, since it is larger than the sum of its proper divisors (169656772103).

216887663097 is a wasteful number, since it uses less digits than its factorization.

216887663097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60397602 (or 60397596 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 216887663097 in words is "two hundred sixteen billion, eight hundred eighty-seven million, six hundred sixty-three thousand, ninety-seven".