7640320563 has 12 divisors (see below), whose sum is σ = 11037453648. Its totient is φ = 5092884720.

The previous prime is 7640320553. The next prime is 7640320607. The reversal of 7640320563 is 3650230467.

7640320563 is a `hidden beast` number, since 7 + 64 + 0 + 32 + 0 + 563 = 666.

It is not a de Polignac number, because 7640320563 - 2¹⁶ = 7640255027 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (7640320553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23818 + ... + 125888.

It is an arithmetic number, because the mean of its divisors is an integer number (919787804).

Almost surely, 2^7640320563 is an apocalyptic number.

7640320563 is a deficient number, since it is larger than the sum of its proper divisors (3397133085).

7640320563 is a wasteful number, since it uses less digits than its factorization.

7640320563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110394 (or 110391 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The square root of 7640320563 is about 87408.9272500241. The cubic root of 7640320563 is about 1969.5659468702.

The spelling of 7640320563 in words is "seven billion, six hundred forty million, three hundred twenty thousand, five hundred sixty-three".