61078375840 has 96 divisors (see below), whose sum is σ = 153973552320. Its totient is φ = 22828345344.

The previous prime is 61078375819. The next prime is 61078375867. The reversal of 61078375840 is 4857387016.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84307 + ... + 359533.

It is an arithmetic number, because the mean of its divisors is an integer number (1603891170).

Almost surely, 2^61078375840 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 61078375840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76986776160).

61078375840 is an abundant number, since it is smaller than the sum of its proper divisors (92895176480).

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

61078375840 is a wasteful number, since it uses less digits than its factorization.

61078375840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275334 (or 275326 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 61078375840 in words is "sixty-one billion, seventy-eight million, three hundred seventy-five thousand, eight hundred forty".