1156220016 has 80 divisors (see below), whose sum is σ = 3478063104. Its totient is φ = 324110592.

The previous prime is 1156220003. The next prime is 1156220059. The reversal of 1156220016 is 6100226511.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14656 + ... + 50271.

Almost surely, 2^1156220016 is an apocalyptic number.

1156220016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1156220016 is an abundant number, since it is smaller than the sum of its proper divisors (2321843088).

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

1156220016 is a wasteful number, since it uses less digits than its factorization.

1156220016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64998 (or 64992 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1156220016 is about 34003.2353754757. The cubic root of 1156220016 is about 1049.5750407308.

Adding to 1156220016 its reverse (6100226511), we get a palindrome (7256446527).

The spelling of 1156220016 in words is "one billion, one hundred fifty-six million, two hundred twenty thousand, sixteen".