61013280 has 96 divisors (see below), whose sum is σ = 194745600. Its totient is φ = 16054272.

The previous prime is 61013269. The next prime is 61013297. The reversal of 61013280 is 8231016.

61013280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37116 + ... + 38724.

It is an arithmetic number, because the mean of its divisors is an integer number (2028600).

Almost surely, 2^61013280 is an apocalyptic number.

61013280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61013280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97372800).

61013280 is an abundant number, since it is smaller than the sum of its proper divisors (133732320).

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

61013280 is a wasteful number, since it uses less digits than its factorization.

61013280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706 (or 1698 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 61013280 is about 7811.0997945232. The cubic root of 61013280 is about 393.6782827307.

Adding to 61013280 its reverse (8231016), we get a palindrome (69244296).

The spelling of 61013280 in words is "sixty-one million, thirteen thousand, two hundred eighty".