755513255661 has 4 divisors (see below), whose sum is σ = 1007351007552. Its totient is φ = 503675503772.

The previous prime is 755513255597. The next prime is 755513255677. The reversal of 755513255661 is 166552315557.

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 755513255661 - 2⁶ = 755513255597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (755513255681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125918875941 + ... + 125918875946.

It is an arithmetic number, because the mean of its divisors is an integer number (251837751888).

Almost surely, 2^755513255661 is an apocalyptic number.

It is an amenable number.

755513255661 is a deficient number, since it is larger than the sum of its proper divisors (251837751891).

755513255661 is a wasteful number, since it uses less digits than its factorization.

755513255661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251837751890.

The product of its digits is 4725000, while the sum is 51.

The spelling of 755513255661 in words is "seven hundred fifty-five billion, five hundred thirteen million, two hundred fifty-five thousand, six hundred sixty-one".