1550665116 has 288 divisors, whose sum is σ = 5409750528. Its totient is φ = 361428480.

The previous prime is 1550665111. The next prime is 1550665121. The reversal of 1550665116 is 6115660551.

It is an interprime number because it is at equal distance from previous prime (1550665111) and next prime (1550665121).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550665111) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1332751 + ... + 1333913.

It is an arithmetic number, because the mean of its divisors is an integer number (18783856).

Almost surely, 2^1550665116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1550665116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2704875264).

1550665116 is an abundant number, since it is smaller than the sum of its proper divisors (3859085412).

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

1550665116 is a wasteful number, since it uses less digits than its factorization.

1550665116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1550665116 is about 39378.4854457355. The cubic root of 1550665116 is about 1157.4600380228.

It can be divided in two parts, 1550 and 665116, that added together give a palindrome (666666).

The spelling of 1550665116 in words is "one billion, five hundred fifty million, six hundred sixty-five thousand, one hundred sixteen".