7756561121 has 8 divisors (see below), whose sum is σ = 8191060800. Its totient is φ = 7324687440.

The previous prime is 7756561103. The next prime is 7756561129. The reversal of 7756561121 is 1211656577.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7756561121 - 2¹⁴ = 7756544737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7756561129) 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 7 ways as a sum of consecutive naturals, for example, 650426 + ... + 662243.

It is an arithmetic number, because the mean of its divisors is an integer number (1023882600).

Almost surely, 2^7756561121 is an apocalyptic number.

It is an amenable number.

7756561121 is a deficient number, since it is larger than the sum of its proper divisors (434499679).

7756561121 is a wasteful number, since it uses less digits than its factorization.

7756561121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312999.

The product of its digits is 88200, while the sum is 41.

The square root of 7756561121 is about 88071.3410877795. The cubic root of 7756561121 is about 1979.5041033564.

The spelling of 7756561121 in words is "seven billion, seven hundred fifty-six million, five hundred sixty-one thousand, one hundred twenty-one".