7775132081 has 4 divisors (see below), whose sum is σ = 7781459700. Its totient is φ = 7768804464.

The previous prime is 7775132069. The next prime is 7775132149. The reversal of 7775132081 is 1802315777.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3494701456 + 4280430625 = 59116^2 + 65425^2 .

It is a cyclic number.

It is not a de Polignac number, because 7775132081 - 2⁶ = 7775132017 is a prime.

It is a super-2 number, since 2×7775132081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7775137081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3161966 + ... + 3164423.

It is an arithmetic number, because the mean of its divisors is an integer number (1945364925).

Almost surely, 2^7775132081 is an apocalyptic number.

It is an amenable number.

7775132081 is a deficient number, since it is larger than the sum of its proper divisors (6327619).

7775132081 is a wasteful number, since it uses less digits than its factorization.

7775132081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6327618.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 7775132081 is about 88176.7094021999. The cubic root of 7775132081 is about 1981.0826376077.

The spelling of 7775132081 in words is "seven billion, seven hundred seventy-five million, one hundred thirty-two thousand, eighty-one".