7640809755 has 32 divisors (see below), whose sum is σ = 12375374400. Its totient is φ = 4025167872.

The previous prime is 7640809747. The next prime is 7640809823. The reversal of 7640809755 is 5579080467.

It is not a de Polignac number, because 7640809755 - 2³ = 7640809747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7640809698 and 7640809707.

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, 1638387 + ... + 1643043.

It is an arithmetic number, because the mean of its divisors is an integer number (386730450).

Almost surely, 2^7640809755 is an apocalyptic number.

7640809755 is a deficient number, since it is larger than the sum of its proper divisors (4734564645).

7640809755 is a wasteful number, since it uses less digits than its factorization.

7640809755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5983.

The product of its (nonzero) digits is 2116800, while the sum is 51.

The square root of 7640809755 is about 87411.7255006444. The cubic root of 7640809755 is about 1969.6079815524.

The spelling of 7640809755 in words is "seven billion, six hundred forty million, eight hundred nine thousand, seven hundred fifty-five".