8551241072640 has 1440 divisors, whose sum is σ = 35518211688960. Its totient is φ = 1933197705216.

The previous prime is 8551241072611. The next prime is 8551241072677. The reversal of 8551241072640 is 462701421558.

8551241072640 is a `hidden beast` number, since 8 + 5 + 512 + 4 + 1 + 0 + 72 + 64 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a super-3 number, since 3×8551241072640³ (a number of 40 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15188704999 + ... + 15188705561.

It is an arithmetic number, because the mean of its divisors is an integer number (24665424784).

Almost surely, 2^{8551241072640} is an apocalyptic number.

8551241072640 is a gapful number since it is divisible by the number (80) 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 8551241072640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17759105844480).

8551241072640 is an abundant number, since it is smaller than the sum of its proper divisors (26966970616320).

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

8551241072640 is an equidigital number, since it uses as much as digits as its factorization.

8551241072640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 8551241072640 in words is "eight trillion, five hundred fifty-one billion, two hundred forty-one million, seventy-two thousand, six hundred forty".