51506161011601 has 16 divisors (see below), whose sum is σ = 54831353347008. Its totient is φ = 48214102809600.

The previous prime is 51506161011593. The next prime is 51506161011631. The reversal of 51506161011601 is 10611016160515.

It is a cyclic number.

It is not a de Polignac number, because 51506161011601 - 2³ = 51506161011593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51506161011631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478281 + ... + 10160761.

It is an arithmetic number, because the mean of its divisors is an integer number (3426959584188).

Almost surely, 2^{51506161011601} is an apocalyptic number.

It is an amenable number.

51506161011601 is a deficient number, since it is larger than the sum of its proper divisors (3325192335407).

51506161011601 is a wasteful number, since it uses less digits than its factorization.

51506161011601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9684192.

The product of its (nonzero) digits is 5400, while the sum is 34.

The spelling of 51506161011601 in words is "fifty-one trillion, five hundred six billion, one hundred sixty-one million, eleven thousand, six hundred one".