6891492666240 has 2048 divisors, whose sum is σ = 31317479424000. Its totient is φ = 1393140695040.

The previous prime is 6891492666203. The next prime is 6891492666277. The reversal of 6891492666240 is 426662941986.

It is an interprime number because it is at equal distance from previous prime (6891492666203) and next prime (6891492666277).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent 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 255 ways as a sum of consecutive naturals, for example, 5313409272 + ... + 5313410568.

It is an arithmetic number, because the mean of its divisors is an integer number (15291738000).

Almost surely, 2^{6891492666240} is an apocalyptic number.

6891492666240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6891492666240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15658739712000).

6891492666240 is an abundant number, since it is smaller than the sum of its proper divisors (24425986757760).

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

6891492666240 is a wasteful number, since it uses less digits than its factorization.

6891492666240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485 (or 1467 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 63.

The spelling of 6891492666240 in words is "six trillion, eight hundred ninety-one billion, four hundred ninety-two million, six hundred sixty-six thousand, two hundred forty".