7640756161 has 4 divisors (see below), whose sum is σ = 7642814400. Its totient is φ = 7638697924.

The previous prime is 7640756153. The next prime is 7640756219. The reversal of 7640756161 is 1616570467.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7640756161 - 2³ = 7640756153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7640756111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1023541 + ... + 1030978.

It is an arithmetic number, because the mean of its divisors is an integer number (1910703600).

Almost surely, 2^7640756161 is an apocalyptic number.

It is an amenable number.

7640756161 is a deficient number, since it is larger than the sum of its proper divisors (2058239).

7640756161 is a wasteful number, since it uses less digits than its factorization.

7640756161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058238.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 7640756161 is about 87411.4189394040. The cubic root of 7640756161 is about 1969.6033764813.

The spelling of 7640756161 in words is "seven billion, six hundred forty million, seven hundred fifty-six thousand, one hundred sixty-one".