6161615550 has 72 divisors (see below), whose sum is σ = 17001664056. Its totient is φ = 1598685120.

The previous prime is 6161615533. The next prime is 6161615557. The reversal of 6161615550 is 555161616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6161615557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 168384 + ... + 201683.

It is an arithmetic number, because the mean of its divisors is an integer number (236134223).

Almost surely, 2^6161615550 is an apocalyptic number.

6161615550 is an abundant number, since it is smaller than the sum of its proper divisors (10840048506).

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

6161615550 is a wasteful number, since it uses less digits than its factorization.

6161615550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370122 (or 370114 counting only the distinct ones).

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

The square root of 6161615550 is about 78495.9588131771. The cubic root of 6161615550 is about 1833.2915320129.

The spelling of 6161615550 in words is "six billion, one hundred sixty-one million, six hundred fifteen thousand, five hundred fifty".