64540847914171 has 16 divisors (see below), whose sum is σ = 68923031592960. Its totient is φ = 60302608198560.

The previous prime is 64540847914141. The next prime is 64540847914201. The reversal of 64540847914171 is 17141974804546.

It is an interprime number because it is at equal distance from previous prime (64540847914141) and next prime (64540847914201).

It is a de Polignac number, because none of the positive numbers 2^k-64540847914171 is a prime.

It is a super-2 number, since 2×64540847914171² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64540847914121) 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, 20179326 + ... + 23157868.

It is an arithmetic number, because the mean of its divisors is an integer number (4307689474560).

Almost surely, 2^{64540847914171} is an apocalyptic number.

64540847914171 is a deficient number, since it is larger than the sum of its proper divisors (4382183678789).

64540847914171 is a wasteful number, since it uses less digits than its factorization.

64540847914171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002706.

The product of its (nonzero) digits is 27095040, while the sum is 61.

The spelling of 64540847914171 in words is "sixty-four trillion, five hundred forty billion, eight hundred forty-seven million, nine hundred fourteen thousand, one hundred seventy-one".