61199242720 has 384 divisors, whose sum is σ = 194192474112. Its totient is φ = 17654630400.

The previous prime is 61199242691. The next prime is 61199242733. The reversal of 61199242720 is 2724299116.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 8780677 + ... + 8787643.

It is an arithmetic number, because the mean of its divisors is an integer number (505709568).

Almost surely, 2^61199242720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61199242720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97096237056).

61199242720 is an abundant number, since it is smaller than the sum of its proper divisors (132993231392).

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

61199242720 is a wasteful number, since it uses less digits than its factorization.

61199242720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7054 (or 7046 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 61199242720 in words is "sixty-one billion, one hundred ninety-nine million, two hundred forty-two thousand, seven hundred twenty".