1201161616 has 20 divisors (see below), whose sum is σ = 2334743424. Its totient is φ = 598647200.

The previous prime is 1201161607. The next prime is 1201161617. The reversal of 1201161616 is 6161611021.

It is not an unprimeable number, because it can be changed into a prime (1201161617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115720 + ... + 125671.

Almost surely, 2^1201161616 is an apocalyptic number.

1201161616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1201161616 is a deficient number, since it is larger than the sum of its proper divisors (1133581808).

1201161616 is a wasteful number, since it uses less digits than its factorization.

1201161616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241710 (or 241704 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1201161616 is about 34657.7785785529. The cubic root of 1201161616 is about 1063.0013478229.

Adding to 1201161616 its reverse (6161611021), we get a palindrome (7362772637).

The spelling of 1201161616 in words is "one billion, two hundred one million, one hundred sixty-one thousand, six hundred sixteen".