61284649428 has 72 divisors (see below), whose sum is σ = 156231839400. Its totient is φ = 20254924800.

The previous prime is 61284649411. The next prime is 61284649451. The reversal of 61284649428 is 82494648216.

It is a happy number.

61284649428 is a `hidden beast` number, since 6 + 128 + 4 + 6 + 494 + 28 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1160628624 + 60124020804 = 34068^2 + 245202^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3085128 + ... + 3104928.

Almost surely, 2^61284649428 is an apocalyptic number.

It is an amenable number.

61284649428 is an abundant number, since it is smaller than the sum of its proper divisors (94947189972).

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

61284649428 is a wasteful number, since it uses less digits than its factorization.

61284649428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20537 (or 20532 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 54.

The spelling of 61284649428 in words is "sixty-one billion, two hundred eighty-four million, six hundred forty-nine thousand, four hundred twenty-eight".