61651120 has 20 divisors (see below), whose sum is σ = 143339040. Its totient is φ = 24660416.

The previous prime is 61651103. The next prime is 61651123. The reversal of 61651120 is 2115616.

61651120 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 (20).

It is a junction number, because it is equal to n+sod(n) for n = 61651091 and 61651100.

It is not an unprimeable number, because it can be changed into a prime (61651123) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 385240 + ... + 385399.

It is an arithmetic number, because the mean of its divisors is an integer number (7166952).

Almost surely, 2^61651120 is an apocalyptic number.

It is an amenable number.

61651120 is an abundant number, since it is smaller than the sum of its proper divisors (81687920).

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

61651120 is a wasteful number, since it uses less digits than its factorization.

61651120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770652 (or 770646 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 61651120 is about 7851.8227183247. The cubic root of 61651120 is about 395.0453828110.

Adding to 61651120 its reverse (2115616), we get a palindrome (63766736).

The spelling of 61651120 in words is "sixty-one million, six hundred fifty-one thousand, one hundred twenty".