61448807916 has 72 divisors (see below), whose sum is σ = 159226507440. Its totient is φ = 19975279104.

The previous prime is 61448807911. The next prime is 61448807957. The reversal of 61448807916 is 61970884416.

61448807916 is a `hidden beast` number, since 614 + 4 + 8 + 8 + 0 + 7 + 9 + 16 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61448807911) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 102531 + ... + 365253.

It is an arithmetic number, because the mean of its divisors is an integer number (2211479270).

Almost surely, 2^61448807916 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 61448807916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79613253720).

61448807916 is an abundant number, since it is smaller than the sum of its proper divisors (97777699524).

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

61448807916 is a wasteful number, since it uses less digits than its factorization.

61448807916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262895 (or 262890 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 61448807916 in words is "sixty-one billion, four hundred forty-eight million, eight hundred seven thousand, nine hundred sixteen".