61147294208 has 320 divisors, whose sum is σ = 165071934720. Its totient is φ = 21852979200.

The previous prime is 61147294193. The next prime is 61147294213. The reversal of 61147294208 is 80249274116.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117364988 + ... + 117365508.

It is an arithmetic number, because the mean of its divisors is an integer number (515849796).

Almost surely, 2^61147294208 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 61147294208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82535967360).

61147294208 is an abundant number, since it is smaller than the sum of its proper divisors (103924640512).

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

61147294208 is a wasteful number, since it uses less digits than its factorization.

61147294208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799 (or 783 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 61147294208 in words is "sixty-one billion, one hundred forty-seven million, two hundred ninety-four thousand, two hundred eight".