61064217828 has 36 divisors (see below), whose sum is σ = 154475901580. Its totient is φ = 20339030016.

The previous prime is 61064217803. The next prime is 61064217859. The reversal of 61064217828 is 82871246016.

61064217828 is a `hidden beast` number, since 610 + 6 + 4 + 2 + 1 + 7 + 8 + 28 = 666.

61064217828 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 2 ways, for example, as 49903985664 + 11160232164 = 223392^2 + 105642^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 607213 + ... + 700596.

Almost surely, 2^61064217828 is an apocalyptic number.

It is an amenable number.

61064217828 is an abundant number, since it is smaller than the sum of its proper divisors (93411683752).

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

61064217828 is a wasteful number, since it uses less digits than its factorization.

61064217828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309116 (or 1309111 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 61064217828 in words is "sixty-one billion, sixty-four million, two hundred seventeen thousand, eight hundred twenty-eight".