640115464351 has 8 divisors (see below), whose sum is σ = 704714274000. Its totient is φ = 576584403840.

The previous prime is 640115464337. The next prime is 640115464397. The reversal of 640115464351 is 153464511046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 640115464351 - 2³¹ = 637967980703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640115494351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266936026 + ... + 266938423.

It is an arithmetic number, because the mean of its divisors is an integer number (88089284250).

Almost surely, 2^640115464351 is an apocalyptic number.

640115464351 is a deficient number, since it is larger than the sum of its proper divisors (64598809649).

640115464351 is a wasteful number, since it uses less digits than its factorization.

640115464351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533874569.

The product of its (nonzero) digits is 172800, while the sum is 40.

Adding to 640115464351 its reverse (153464511046), we get a palindrome (793579975397).

The spelling of 640115464351 in words is "six hundred forty billion, one hundred fifteen million, four hundred sixty-four thousand, three hundred fifty-one".