640000000007 has 2 divisors, whose sum is σ = 640000000008. Its totient is φ = 640000000006.

The previous prime is 639999999979. The next prime is 640000000027. The reversal of 640000000007 is 700000000046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 640000000007 - 2²² = 639995805703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (640000000027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320000000003 + 320000000004.

It is an arithmetic number, because the mean of its divisors is an integer number (320000000004).

Almost surely, 2^640000000007 is an apocalyptic number.

640000000007 is a deficient number, since it is larger than the sum of its proper divisors (1).

640000000007 is an equidigital number, since it uses as much as digits as its factorization.

640000000007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 17.

It can be divided in two parts, 6 and 40000000007, that multiplied together give a palindrome (240000000042).

The spelling of 640000000007 in words is "six hundred forty billion, seven", and thus it is an aban number.