216980001628 has 24 divisors (see below), whose sum is σ = 409042476752. Its totient is φ = 100115564544.

The previous prime is 216980001587. The next prime is 216980001703. The reversal of 216980001628 is 826100089612.

It is a happy number.

It is a super-2 number, since 2×216980001628² (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 7 ways as a sum of consecutive naturals, for example, 423750 + ... + 783277.

Almost surely, 2^216980001628 is an apocalyptic number.

It is an amenable number.

216980001628 is a deficient number, since it is larger than the sum of its proper divisors (192062475124).

216980001628 is a wasteful number, since it uses less digits than its factorization.

216980001628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210501 (or 1210499 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 216980001628 in words is "two hundred sixteen billion, nine hundred eighty million, one thousand, six hundred twenty-eight".