20455715560775 has 96 divisors (see below), whose sum is σ = 29225572443648. Its totient is φ = 14057384140800.

The previous prime is 20455715560723. The next prime is 20455715560783. The reversal of 20455715560775 is 57706551755402.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20455715560775 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 335567699 + ... + 335628651.

It is an arithmetic number, because the mean of its divisors is an integer number (304433046288).

Almost surely, 2^{20455715560775} is an apocalyptic number.

20455715560775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20455715560775 is a deficient number, since it is larger than the sum of its proper divisors (8769856882873).

20455715560775 is a wasteful number, since it uses less digits than its factorization.

20455715560775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61641 (or 61636 counting only the distinct ones).

The product of its (nonzero) digits is 51450000, while the sum is 59.

The spelling of 20455715560775 in words is "twenty trillion, four hundred fifty-five billion, seven hundred fifteen million, five hundred sixty thousand, seven hundred seventy-five".