1611916650 has 72 divisors (see below), whose sum is σ = 4390096620. Its totient is φ = 423947520.

The previous prime is 1611916597. The next prime is 1611916651. The reversal of 1611916650 is 566191161.

It can be written as a sum of positive squares in 6 ways, for example, as 165559689 + 1446356961 = 12867^2 + 38031^2 .

It is not an unprimeable number, because it can be changed into a prime (1611916651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8316 + ... + 57384.

Almost surely, 2^1611916650 is an apocalyptic number.

1611916650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1611916650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2195048310).

1611916650 is an abundant number, since it is smaller than the sum of its proper divisors (2778179970).

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

1611916650 is a wasteful number, since it uses less digits than its factorization.

1611916650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49160 (or 49152 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 1611916650 is about 40148.6817965422. The cubic root of 1611916650 is about 1172.5036241161.

The spelling of 1611916650 in words is "one billion, six hundred eleven million, nine hundred sixteen thousand, six hundred fifty".