61551268389 has 32 divisors (see below), whose sum is σ = 98860608000. Its totient is φ = 37623458880.

The previous prime is 61551268367. The next prime is 61551268451. The reversal of 61551268389 is 98386215516.

61551268389 is a `hidden beast` number, since 6 + 1 + 551 + 2 + 6 + 8 + 3 + 89 = 666.

It is not a de Polignac number, because 61551268389 - 2⁸ = 61551268133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61551260389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 536157 + ... + 640754.

It is an arithmetic number, because the mean of its divisors is an integer number (3089394000).

Almost surely, 2^61551268389 is an apocalyptic number.

It is an amenable number.

61551268389 is a deficient number, since it is larger than the sum of its proper divisors (37309339611).

61551268389 is a wasteful number, since it uses less digits than its factorization.

61551268389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177082 (or 1177076 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The spelling of 61551268389 in words is "sixty-one billion, five hundred fifty-one million, two hundred sixty-eight thousand, three hundred eighty-nine".