61628318266 has 4 divisors (see below), whose sum is σ = 92442477402. Its totient is φ = 30814159132.

The previous prime is 61628318161. The next prime is 61628318273. The reversal of 61628318266 is 66281382616.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 59863898241 + 1764420025 = 244671^2 + 42005^2 .

It is a super-2 number, since 2×61628318266² (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 as a sum of consecutive naturals, namely, 15407079565 + ... + 15407079568.

Almost surely, 2^61628318266 is an apocalyptic number.

61628318266 is a deficient number, since it is larger than the sum of its proper divisors (30814159136).

61628318266 is a wasteful number, since it uses less digits than its factorization.

61628318266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30814159135.

The product of its digits is 995328, while the sum is 49.

The spelling of 61628318266 in words is "sixty-one billion, six hundred twenty-eight million, three hundred eighteen thousand, two hundred sixty-six".