51665501616001 has 8 divisors (see below), whose sum is σ = 63588309681344. Its totient is φ = 40878199080720.

The previous prime is 51665501615993. The next prime is 51665501616007. The reversal of 51665501616001 is 10061610556615.

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 51665501616001 - 2³ = 51665501615993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51665501616007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283876382415 + ... + 283876382596.

It is an arithmetic number, because the mean of its divisors is an integer number (7948538710168).

Almost surely, 2^{51665501616001} is an apocalyptic number.

It is an amenable number.

51665501616001 is a deficient number, since it is larger than the sum of its proper divisors (11922808065343).

51665501616001 is a wasteful number, since it uses less digits than its factorization.

51665501616001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567752765031.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 51665501616001 in words is "fifty-one trillion, six hundred sixty-five billion, five hundred one million, six hundred sixteen thousand, one".