67919945905551 has 32 divisors (see below), whose sum is σ = 97361185996800. Its totient is φ = 41981208340320.

The previous prime is 67919945905549. The next prime is 67919945905571. The reversal of 67919945905551 is 15550954991976.

It is not a de Polignac number, because 67919945905551 - 2¹ = 67919945905549 is a prime.

It is a super-2 number, since 2×67919945905551² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67919945905571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38220510 + ... + 39958068.

It is an arithmetic number, because the mean of its divisors is an integer number (3042537062400).

Almost surely, 2^{67919945905551} is an apocalyptic number.

67919945905551 is a deficient number, since it is larger than the sum of its proper divisors (29441240091249).

67919945905551 is a wasteful number, since it uses less digits than its factorization.

67919945905551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752219.

The product of its (nonzero) digits is 688905000, while the sum is 75.

The spelling of 67919945905551 in words is "sixty-seven trillion, nine hundred nineteen billion, nine hundred forty-five million, nine hundred five thousand, five hundred fifty-one".