7641065840 has 40 divisors (see below), whose sum is σ = 18700506960. Its totient is φ = 2895561216.

The previous prime is 7641065833. The next prime is 7641065851. The reversal of 7641065840 is 485601467.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×7641065840³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2511989 + ... + 2515028.

It is an arithmetic number, because the mean of its divisors is an integer number (467512674).

Almost surely, 2^7641065840 is an apocalyptic number.

It is an amenable number.

7641065840 is an abundant number, since it is smaller than the sum of its proper divisors (11059441120).

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

7641065840 is a wasteful number, since it uses less digits than its factorization.

7641065840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027049 (or 5027043 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 7641065840 is about 87413.1903090146. The cubic root of 7641065840 is about 1969.6299853907.

The spelling of 7641065840 in words is "seven billion, six hundred forty-one million, sixty-five thousand, eight hundred forty".