611161151550 has 96 divisors (see below), whose sum is σ = 1553336767584. Its totient is φ = 158930688000.

The previous prime is 611161151521. The next prime is 611161151551. The reversal of 611161151550 is 55151161116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611161151551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14622282 + ... + 14664018.

It is an arithmetic number, because the mean of its divisors is an integer number (16180591329).

Almost surely, 2^611161151550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 611161151550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (776668383792).

611161151550 is an abundant number, since it is smaller than the sum of its proper divisors (942175616034).

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

611161151550 is a wasteful number, since it uses less digits than its factorization.

611161151550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44174 (or 44169 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 33.

The spelling of 611161151550 in words is "six hundred eleven billion, one hundred sixty-one million, one hundred fifty-one thousand, five hundred fifty".