61451316 has 18 divisors (see below), whose sum is σ = 155335362. Its totient is φ = 20483760.

The previous prime is 61451309. The next prime is 61451317. The reversal of 61451316 is 61315416.

61451316 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 36650916 + 24800400 = 6054^2 + 4980^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 61451316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61451317) 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 5 ways as a sum of consecutive naturals, for example, 853455 + ... + 853526.

Almost surely, 2^61451316 is an apocalyptic number.

It is an amenable number.

61451316 is an abundant number, since it is smaller than the sum of its proper divisors (93884046).

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

61451316 is a wasteful number, since it uses less digits than its factorization.

61451316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706991 (or 1706986 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 61451316 is about 7839.0889776810. The cubic root of 61451316 is about 394.6181558014.

The spelling of 61451316 in words is "sixty-one million, four hundred fifty-one thousand, three hundred sixteen".