640450425145 has 16 divisors (see below), whose sum is σ = 770330972160. Its totient is φ = 511167219264.

The previous prime is 640450425127. The next prime is 640450425161. The reversal of 640450425145 is 541524054046.

It is a cyclic number.

It is not a de Polignac number, because 640450425145 - 2¹¹ = 640450423097 is a prime.

It is a super-2 number, since 2×640450425145² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 640450425098 and 640450425107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10620499 + ... + 10680631.

It is an arithmetic number, because the mean of its divisors is an integer number (48145685760).

Almost surely, 2^640450425145 is an apocalyptic number.

It is an amenable number.

640450425145 is a deficient number, since it is larger than the sum of its proper divisors (129880547015).

640450425145 is a wasteful number, since it uses less digits than its factorization.

640450425145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65064.

The product of its (nonzero) digits is 384000, while the sum is 40.

The spelling of 640450425145 in words is "six hundred forty billion, four hundred fifty million, four hundred twenty-five thousand, one hundred forty-five".