1217708016 has 60 divisors (see below), whose sum is σ = 3659343912. Its totient is φ = 347915904.

The previous prime is 1217707991. The next prime is 1217708017. The reversal of 1217708016 is 6108077121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217708017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256515 + ... + 261218.

Almost surely, 2^1217708016 is an apocalyptic number.

1217708016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1217708016 is an abundant number, since it is smaller than the sum of its proper divisors (2441635896).

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

1217708016 is a wasteful number, since it uses less digits than its factorization.

1217708016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517758 (or 517745 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 33.

The square root of 1217708016 is about 34895.6733134639. The cubic root of 1217708016 is about 1067.8601705023.

The spelling of 1217708016 in words is "one billion, two hundred seventeen million, seven hundred eight thousand, sixteen".