61605061610624 has 128 divisors (see below), whose sum is σ = 144241728808320. Its totient is φ = 25654830243840.

The previous prime is 61605061610621. The next prime is 61605061610647. The reversal of 61605061610624 is 42601616050616.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (61605061610621) 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 15 ways as a sum of consecutive naturals, for example, 24007739 + ... + 26449605.

It is an arithmetic number, because the mean of its divisors is an integer number (1126888506315).

Almost surely, 2^{61605061610624} is an apocalyptic number.

61605061610624 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61605061610624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72120864404160).

61605061610624 is an abundant number, since it is smaller than the sum of its proper divisors (82636667197696).

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

61605061610624 is a wasteful number, since it uses less digits than its factorization.

61605061610624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2442686 (or 2442674 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 61605061610624 in words is "sixty-one trillion, six hundred five billion, sixty-one million, six hundred ten thousand, six hundred twenty-four".