61550166516 has 24 divisors (see below), whose sum is σ = 144249735840. Its totient is φ = 20426339232.

The previous prime is 61550166511. The next prime is 61550166553. The reversal of 61550166516 is 61566105516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61550166511) 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 7 ways as a sum of consecutive naturals, for example, 11295031 + ... + 11300478.

It is an arithmetic number, because the mean of its divisors is an integer number (6010405660).

Almost surely, 2^61550166516 is an apocalyptic number.

It is an amenable number.

61550166516 is an abundant number, since it is smaller than the sum of its proper divisors (82699569324).

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

61550166516 is a wasteful number, since it uses less digits than its factorization.

61550166516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22595743 (or 22595741 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 61550166516 in words is "sixty-one billion, five hundred fifty million, one hundred sixty-six thousand, five hundred sixteen".