61064620848 has 630 divisors, whose sum is σ = 227070448332. Its totient is φ = 15842977920.

The previous prime is 61064620843. The next prime is 61064620861. The reversal of 61064620848 is 84802646016.

61064620848 is a `hidden beast` number, since 6 + 10 + 6 + 4 + 620 + 8 + 4 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (61064620843) 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 125 ways as a sum of consecutive naturals, for example, 69155415 + ... + 69156297.

Almost surely, 2^61064620848 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 61064620848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113535224166).

61064620848 is an abundant number, since it is smaller than the sum of its proper divisors (166005827484).

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

61064620848 is a wasteful number, since it uses less digits than its factorization.

61064620848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945 (or 906 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 61064620848 in words is "sixty-one billion, sixty-four million, six hundred twenty thousand, eight hundred forty-eight".