640360415265 has 16 divisors (see below), whose sum is σ = 1025213481600. Its totient is φ = 341313282432.

The previous prime is 640360415251. The next prime is 640360415267. The reversal of 640360415265 is 562514063046.

It is not a de Polignac number, because 640360415265 - 2⁹ = 640360414753 is a prime.

It is a super-2 number, since 2×640360415265² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (640360415267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13242085 + ... + 13290354.

It is an arithmetic number, because the mean of its divisors is an integer number (64075842600).

Almost surely, 2^640360415265 is an apocalyptic number.

It is an amenable number.

640360415265 is a deficient number, since it is larger than the sum of its proper divisors (384853066335).

640360415265 is a wasteful number, since it uses less digits than its factorization.

640360415265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26534056.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 640360415265 in words is "six hundred forty billion, three hundred sixty million, four hundred fifteen thousand, two hundred sixty-five".