216827638902 has 24 divisors (see below), whose sum is σ = 536906534736. Its totient is φ = 61950753936.

The previous prime is 216827638879. The next prime is 216827638957. The reversal of 216827638902 is 209836728612.

It is a super-2 number, since 2×216827638902² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 860427013 + ... + 860427264.

It is an arithmetic number, because the mean of its divisors is an integer number (22371105614).

Almost surely, 2^216827638902 is an apocalyptic number.

216827638902 is an abundant number, since it is smaller than the sum of its proper divisors (320078895834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216827638902 is a wasteful number, since it uses less digits than its factorization.

216827638902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720854292 (or 1720854289 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 216827638902 in words is "two hundred sixteen billion, eight hundred twenty-seven million, six hundred thirty-eight thousand, nine hundred two".