54564416505561 has 8 divisors (see below), whose sum is σ = 72808475834304. Its totient is φ = 36348317423600.

The previous prime is 54564416505553. The next prime is 54564416505637. The reversal of 54564416505561 is 16550561446545.

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 54564416505561 - 2³ = 54564416505553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54564416505961) 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, 6990057141 + ... + 6990064946.

It is an arithmetic number, because the mean of its divisors is an integer number (9101059479288).

Almost surely, 2^{54564416505561} is an apocalyptic number.

It is an amenable number.

54564416505561 is a deficient number, since it is larger than the sum of its proper divisors (18244059328743).

54564416505561 is a wasteful number, since it uses less digits than its factorization.

54564416505561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13980123391.

The product of its (nonzero) digits is 43200000, while the sum is 57.

The spelling of 54564416505561 in words is "fifty-four trillion, five hundred sixty-four billion, four hundred sixteen million, five hundred five thousand, five hundred sixty-one".