61228038249 has 27 divisors (see below), whose sum is σ = 102888496893. Its totient is φ = 34984481112.

The previous prime is 61228038241. The next prime is 61228038259. The reversal of 61228038249 is 94283082216.

The square root of 61228038249 is 247443.

It is a perfect power (a square), and thus also a powerful number.

61228038249 is a `hidden beast` number, since 6 + 1 + 228 + 0 + 382 + 49 = 666.

61228038249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61228038249 - 2³ = 61228038241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61228038241) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5190412 + ... + 5202194.

Almost surely, 2^61228038249 is an apocalyptic number.

61228038249 is the 247443-rd square number.

61228038249 is the 123722-nd centered octagonal number.

It is an amenable number.

61228038249 is a deficient number, since it is larger than the sum of its proper divisors (41660458644).

61228038249 is an frugal number, since it uses more digits than its factorization.

61228038249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23586 (or 11793 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 61228038249 in words is "sixty-one billion, two hundred twenty-eight million, thirty-eight thousand, two hundred forty-nine".