61051844880 has 360 divisors, whose sum is σ = 230252637888. Its totient is φ = 15027337728.

The previous prime is 61051844879. The next prime is 61051844891. The reversal of 61051844880 is 8844815016.

61051844880 is a `hidden beast` number, since 6 + 10 + 518 + 4 + 48 + 80 = 666.

61051844880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3276069 + ... + 3294651.

Almost surely, 2^61051844880 is an apocalyptic number.

61051844880 is a gapful number since it is divisible by the number (60) 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 61051844880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115126318944).

61051844880 is an abundant number, since it is smaller than the sum of its proper divisors (169200793008).

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

61051844880 is a wasteful number, since it uses less digits than its factorization.

61051844880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18637 (or 18606 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The spelling of 61051844880 in words is "sixty-one billion, fifty-one million, eight hundred forty-four thousand, eight hundred eighty".