6851661454000 has 640 divisors, whose sum is σ = 19015962900480. Its totient is φ = 2365798400000.

The previous prime is 6851661453991. The next prime is 6851661454009. The reversal of 6851661454000 is 4541661586.

It is an interprime number because it is at equal distance from previous prime (6851661453991) and next prime (6851661454009).

It is not an unprimeable number, because it can be changed into a prime (6851661454009) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5315485356 + ... + 5315486644.

It is an arithmetic number, because the mean of its divisors is an integer number (29712442032).

Almost surely, 2^{6851661454000} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6851661454000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9507981450240).

6851661454000 is an abundant number, since it is smaller than the sum of its proper divisors (12164301446480).

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

6851661454000 is a wasteful number, since it uses less digits than its factorization.

6851661454000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518 (or 1502 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 46.

It can be divided in two parts, 68516 and 61454000, that added together give a palindrome (61522516).

The spelling of 6851661454000 in words is "six trillion, eight hundred fifty-one billion, six hundred sixty-one million, four hundred fifty-four thousand".