7655240561 has 8 divisors (see below), whose sum is σ = 7735624104. Its totient is φ = 7574947200.

The previous prime is 7655240521. The next prime is 7655240563. The reversal of 7655240561 is 1650425567.

It can be written as a sum of positive squares in 4 ways, for example, as 37442161 + 7617798400 = 6119^2 + 87280^2 .

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 7655240561 - 2¹⁴ = 7655224177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7655240563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155435 + ... + 198671.

It is an arithmetic number, because the mean of its divisors is an integer number (966953013).

Almost surely, 2^7655240561 is an apocalyptic number.

It is an amenable number.

7655240561 is a deficient number, since it is larger than the sum of its proper divisors (80383543).

7655240561 is a wasteful number, since it uses less digits than its factorization.

7655240561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45091.

The product of its (nonzero) digits is 252000, while the sum is 41.

The square root of 7655240561 is about 87494.2315870024. The cubic root of 7655240561 is about 1970.8471676524.

The spelling of 7655240561 in words is "seven billion, six hundred fifty-five million, two hundred forty thousand, five hundred sixty-one".