61064480420 has 72 divisors (see below), whose sum is σ = 136977345960. Its totient is φ = 22861578240.

The previous prime is 61064480401. The next prime is 61064480423. The reversal of 61064480420 is 2408446016.

61064480420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 13446257764 + 47618222656 = 115958^2 + 218216^2 .

It is not an unprimeable number, because it can be changed into a prime (61064480423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1016996 + ... + 1075364.

Almost surely, 2^61064480420 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 61064480420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68488672980).

61064480420 is an abundant number, since it is smaller than the sum of its proper divisors (75912865540).

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

61064480420 is a wasteful number, since it uses less digits than its factorization.

61064480420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58593 (or 58574 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The spelling of 61064480420 in words is "sixty-one billion, sixty-four million, four hundred eighty thousand, four hundred twenty".