51541266664561 has 8 divisors (see below), whose sum is σ = 51660604974944. Its totient is φ = 51421929762240.

The previous prime is 51541266664541. The next prime is 51541266664567. The reversal of 51541266664561 is 16546666214515.

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 51541266664561 - 2¹¹ = 51541266662513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51541266664496 and 51541266664505.

It is not an unprimeable number, because it can be changed into a prime (51541266664567) 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, 122340406 + ... + 122760976.

It is an arithmetic number, because the mean of its divisors is an integer number (6457575621868).

Almost surely, 2^{51541266664561} is an apocalyptic number.

It is an amenable number.

51541266664561 is a deficient number, since it is larger than the sum of its proper divisors (119338310383).

51541266664561 is a wasteful number, since it uses less digits than its factorization.

51541266664561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704031.

The product of its digits is 31104000, while the sum is 58.

The spelling of 51541266664561 in words is "fifty-one trillion, five hundred forty-one billion, two hundred sixty-six million, six hundred sixty-four thousand, five hundred sixty-one".