553660641561 has 32 divisors (see below), whose sum is σ = 820507097088. Its totient is φ = 330300903680.

The previous prime is 553660641467. The next prime is 553660641577. The reversal of 553660641561 is 165146066355.

It is a cyclic number.

It is not a de Polignac number, because 553660641561 - 2⁷ = 553660641433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 553660641561.

It is not an unprimeable number, because it can be changed into a prime (553660641361) 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 31 ways as a sum of consecutive naturals, for example, 1217295 + ... + 1609076.

It is an arithmetic number, because the mean of its divisors is an integer number (25640846784).

Almost surely, 2^553660641561 is an apocalyptic number.

553660641561 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

553660641561 is a deficient number, since it is larger than the sum of its proper divisors (266846455527).

553660641561 is a wasteful number, since it uses less digits than its factorization.

553660641561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2826581.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 553660641561 in words is "five hundred fifty-three billion, six hundred sixty million, six hundred forty-one thousand, five hundred sixty-one".