61298019684 has 54 divisors (see below), whose sum is σ = 170314505270. Its totient is φ = 18575156160.

The previous prime is 61298019611. The next prime is 61298019689. The reversal of 61298019684 is 48691089216.

61298019684 is a `hidden beast` number, since 612 + 9 + 8 + 0 + 19 + 6 + 8 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 40974666084 + 20323353600 = 202422^2 + 142560^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61298019684.

It is not an unprimeable number, because it can be changed into a prime (61298019689) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 7031689 + ... + 7040400.

Almost surely, 2^61298019684 is an apocalyptic number.

It is an amenable number.

61298019684 is an abundant number, since it is smaller than the sum of its proper divisors (109016485586).

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

61298019684 is a wasteful number, since it uses less digits than its factorization.

61298019684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14072121 (or 14072105 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The spelling of 61298019684 in words is "sixty-one billion, two hundred ninety-eight million, nineteen thousand, six hundred eighty-four".