61894551668306 has 16 divisors (see below), whose sum is σ = 109763736949440. Its totient is φ = 25611538621200.

The previous prime is 61894551668239. The next prime is 61894551668309. The reversal of 61894551668306 is 60386615549816.

It is not an unprimeable number, because it can be changed into a prime (61894551668309) 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 7 ways as a sum of consecutive naturals, for example, 76224816920 + ... + 76224817731.

It is an arithmetic number, because the mean of its divisors is an integer number (6860233559340).

Almost surely, 2^{61894551668306} is an apocalyptic number.

61894551668306 is a deficient number, since it is larger than the sum of its proper divisors (47869185281134).

61894551668306 is a wasteful number, since it uses less digits than its factorization.

61894551668306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152449634689.

The product of its (nonzero) digits is 223948800, while the sum is 68.

The spelling of 61894551668306 in words is "sixty-one trillion, eight hundred ninety-four billion, five hundred fifty-one million, six hundred sixty-eight thousand, three hundred six".