1099161216 has 48 divisors (see below), whose sum is σ = 3162954210. Its totient is φ = 366386688.

The previous prime is 1099161211. The next prime is 1099161221. The reversal of 1099161216 is 6121619901.

It is an interprime number because it is at equal distance from previous prime (1099161211) and next prime (1099161221).

It can be written as a sum of positive squares in only one way, i.e., 703310400 + 395850816 = 26520^2 + 19896^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1099161211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 475915 + ... + 478218.

Almost surely, 2^1099161216 is an apocalyptic number.

1099161216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1099161216 is an abundant number, since it is smaller than the sum of its proper divisors (2063792994).

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

1099161216 is an equidigital number, since it uses as much as digits as its factorization.

1099161216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954153 (or 954138 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 1099161216 is about 33153.6003474736. The cubic root of 1099161216 is about 1032.0176669051.

The spelling of 1099161216 in words is "one billion, ninety-nine million, one hundred sixty-one thousand, two hundred sixteen".