61041384720 has 120 divisors (see below), whose sum is σ = 208865321496. Its totient is φ = 15970566144.

The previous prime is 61041384707. The next prime is 61041384757. The reversal of 61041384720 is 2748314016.

61041384720 is a `hidden beast` number, since 610 + 4 + 1 + 38 + 4 + 7 + 2 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 21461078016 + 39580306704 = 146496^2 + 198948^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-4 number, since 4×61041384720⁴ (a number of 44 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 761649 + ... + 837968.

Almost surely, 2^61041384720 is an apocalyptic number.

61041384720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61041384720 is an abundant number, since it is smaller than the sum of its proper divisors (147823936776).

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

61041384720 is a wasteful number, since it uses less digits than its factorization.

61041384720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599689 (or 1599680 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

Adding to 61041384720 its reverse (2748314016), we get a palindrome (63789698736).

The spelling of 61041384720 in words is "sixty-one billion, forty-one million, three hundred eighty-four thousand, seven hundred twenty".