640151361724331 has 2 divisors, whose sum is σ = 640151361724332. Its totient is φ = 640151361724330.

The previous prime is 640151361724279. The next prime is 640151361724373. The reversal of 640151361724331 is 133427163151046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 640151361724331 - 2²⁶ = 640151294615467 is a prime.

It is a super-2 number, since 2×640151361724331² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (640151361724531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320075680862165 + 320075680862166.

It is an arithmetic number, because the mean of its divisors is an integer number (320075680862166).

Almost surely, 2^{640151361724331} is an apocalyptic number.

640151361724331 is a deficient number, since it is larger than the sum of its proper divisors (1).

640151361724331 is an equidigital number, since it uses as much as digits as its factorization.

640151361724331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 640151361724331 in words is "six hundred forty trillion, one hundred fifty-one billion, three hundred sixty-one million, seven hundred twenty-four thousand, three hundred thirty-one".