64513740181265 has 8 divisors (see below), whose sum is σ = 77446367232768. Its totient is φ = 51591072801520.

The previous prime is 64513740181259. The next prime is 64513740181271. The reversal of 64513740181265 is 56218104731546.

It is an interprime number because it is at equal distance from previous prime (64513740181259) and next prime (64513740181271).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-64513740181265 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2489903687 + ... + 2489929596.

It is an arithmetic number, because the mean of its divisors is an integer number (9680795904096).

Almost surely, 2^{64513740181265} is an apocalyptic number.

It is an amenable number.

64513740181265 is a deficient number, since it is larger than the sum of its proper divisors (12932627051503).

64513740181265 is a wasteful number, since it uses less digits than its factorization.

64513740181265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4979835879.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 64513740181265 in words is "sixty-four trillion, five hundred thirteen billion, seven hundred forty million, one hundred eighty-one thousand, two hundred sixty-five".