65051551611551 has 32 divisors (see below), whose sum is σ = 72304992662400. Its totient is φ = 58211907747840.

The previous prime is 65051551611547. The next prime is 65051551611569. The reversal of 65051551611551 is 15511615515056.

It is not a de Polignac number, because 65051551611551 - 2² = 65051551611547 is a prime.

It is a super-4 number, since 4×65051551611551⁴ (a number of 56 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65051551611496 and 65051551611505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65051551611511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44213435 + ... + 45661043.

It is an arithmetic number, because the mean of its divisors is an integer number (2259531020700).

Almost surely, 2^{65051551611551} is an apocalyptic number.

65051551611551 is a deficient number, since it is larger than the sum of its proper divisors (7253441050849).

65051551611551 is a wasteful number, since it uses less digits than its factorization.

65051551611551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448339.

The product of its (nonzero) digits is 562500, while the sum is 47.

The spelling of 65051551611551 in words is "sixty-five trillion, fifty-one billion, five hundred fifty-one million, six hundred eleven thousand, five hundred fifty-one".