6129280891885 has 4 divisors (see below), whose sum is σ = 7355137070268. Its totient is φ = 4903424713504.

The previous prime is 6129280891847. The next prime is 6129280891897. The reversal of 6129280891885 is 5881980829216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3207817117444 + 2921463774441 = 1791038^2 + 1709229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6129280891885 is a prime.

It is a super-4 number, since 4×6129280891885⁴ (a number of 52 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6129280891885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612928089184 + ... + 612928089193.

It is an arithmetic number, because the mean of its divisors is an integer number (1838784267567).

Almost surely, 2^{6129280891885} is an apocalyptic number.

It is an amenable number.

6129280891885 is a deficient number, since it is larger than the sum of its proper divisors (1225856178383).

6129280891885 is a wasteful number, since it uses less digits than its factorization.

6129280891885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225856178382.

The product of its (nonzero) digits is 39813120, while the sum is 67.

The spelling of 6129280891885 in words is "six trillion, one hundred twenty-nine billion, two hundred eighty million, eight hundred ninety-one thousand, eight hundred eighty-five".