7641866544 has 160 divisors (see below), whose sum is σ = 22015924224. Its totient is φ = 2268241920.

The previous prime is 7641866539. The next prime is 7641866569. The reversal of 7641866544 is 4456681467.

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 31 ways as a sum of consecutive naturals, for example, 11354592 + ... + 11355264.

Almost surely, 2^7641866544 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 7641866544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11007962112).

7641866544 is an abundant number, since it is smaller than the sum of its proper divisors (14374057680).

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

7641866544 is a wasteful number, since it uses less digits than its factorization.

7641866544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315 (or 1309 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 51.

The square root of 7641866544 is about 87417.7701843281. The cubic root of 7641866544 is about 1969.6987818804.

The spelling of 7641866544 in words is "seven billion, six hundred forty-one million, eight hundred sixty-six thousand, five hundred forty-four".