61787272 has 16 divisors (see below), whose sum is σ = 116041500. Its totient is φ = 30842880.

The previous prime is 61787267. The next prime is 61787291. The reversal of 61787272 is 27278716.

61787272 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 2 ways, for example, as 55264356 + 6522916 = 7434^2 + 2554^2 .

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 3 ways as a sum of consecutive naturals, for example, 897 + ... + 11152.

Almost surely, 2^61787272 is an apocalyptic number.

It is an amenable number.

61787272 is a deficient number, since it is larger than the sum of its proper divisors (54254228).

61787272 is a wasteful number, since it uses less digits than its factorization.

61787272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12696 (or 12692 counting only the distinct ones).

The product of its digits is 65856, while the sum is 40.

The square root of 61787272 is about 7860.4880255618. The cubic root of 61787272 is about 395.3359786302.

The spelling of 61787272 in words is "sixty-one million, seven hundred eighty-seven thousand, two hundred seventy-two".