755695863661 has 2 divisors, whose sum is σ = 755695863662. Its totient is φ = 755695863660.

The previous prime is 755695863649. The next prime is 755695863691. The reversal of 755695863661 is 166368596557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 755280926761 + 414936900 = 869069^2 + 20370^2 .

It is a cyclic number.

It is not a de Polignac number, because 755695863661 - 2³⁷ = 618256910189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (755695863691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 377847931830 + 377847931831.

It is an arithmetic number, because the mean of its divisors is an integer number (377847931831).

Almost surely, 2^755695863661 is an apocalyptic number.

It is an amenable number.

755695863661 is a deficient number, since it is larger than the sum of its proper divisors (1).

755695863661 is an equidigital number, since it uses as much as digits as its factorization.

755695863661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944000, while the sum is 67.

The spelling of 755695863661 in words is "seven hundred fifty-five billion, six hundred ninety-five million, eight hundred sixty-three thousand, six hundred sixty-one".