61286883428 has 24 divisors (see below), whose sum is σ = 107868116664. Its totient is φ = 30467897600.

The previous prime is 61286883397. The next prime is 61286883451. The reversal of 61286883428 is 82438868216.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2292302884 + 58994580544 = 47878^2 + 242888^2 .

It is a super-2 number, since 2×61286883428² (a number of 22 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 459026 + ... + 577302.

It is an arithmetic number, because the mean of its divisors is an integer number (4494504861).

Almost surely, 2^61286883428 is an apocalyptic number.

It is an amenable number.

61286883428 is a deficient number, since it is larger than the sum of its proper divisors (46581233236).

61286883428 is a wasteful number, since it uses less digits than its factorization.

61286883428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119023 (or 119021 counting only the distinct ones).

The product of its digits is 7077888, while the sum is 56.

The spelling of 61286883428 in words is "sixty-one billion, two hundred eighty-six million, eight hundred eighty-three thousand, four hundred twenty-eight".