67889429136 has 45 divisors (see below), whose sum is σ = 190004861449. Its totient is φ = 22628767488.

The previous prime is 67889429117. The next prime is 67889429143. The reversal of 67889429136 is 63192498876.

The square root of 67889429136 is 260556.

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

67889429136 is a `hidden beast` number, since 6 + 78 + 8 + 9 + 429 + 136 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17598675600 + 50290753536 = 132660^2 + 224256^2 .

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 3115816 + ... + 3137528.

Almost surely, 2^67889429136 is an apocalyptic number.

67889429136 is the 260556-th square number.

It is an amenable number.

67889429136 is an abundant number, since it is smaller than the sum of its proper divisors (122115432313).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67889429136 is an frugal number, since it uses more digits than its factorization.

67889429136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43440 (or 21718 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

It can be divided in two parts, 67889 and 429136, that added together give a square (497025 = 705²).

The spelling of 67889429136 in words is "sixty-seven billion, eight hundred eighty-nine million, four hundred twenty-nine thousand, one hundred thirty-six".