640030361121 has 6 divisors (see below), whose sum is σ = 924488299410. Its totient is φ = 426686907408.

The previous prime is 640030361077. The next prime is 640030361123. The reversal of 640030361121 is 121163030046.

640030361121 is a `hidden beast` number, since 6 + 40 + 0 + 3 + 0 + 3 + 611 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 544586437521 + 95443923600 = 737961^2 + 308940^2 .

It is not a de Polignac number, because 640030361121 - 2²⁵ = 639996806689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640030361123) 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 5 ways as a sum of consecutive naturals, for example, 35557242276 + ... + 35557242293.

It is an arithmetic number, because the mean of its divisors is an integer number (154081383235).

Almost surely, 2^640030361121 is an apocalyptic number.

It is an amenable number.

640030361121 is a deficient number, since it is larger than the sum of its proper divisors (284457938289).

640030361121 is a wasteful number, since it uses less digits than its factorization.

640030361121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71114484575 (or 71114484572 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 640030361121 its reverse (121163030046), we get a palindrome (761193391167).

The spelling of 640030361121 in words is "six hundred forty billion, thirty million, three hundred sixty-one thousand, one hundred twenty-one".