640251142310 has 32 divisors (see below), whose sum is σ = 1267508656512. Its totient is φ = 231370623360.

The previous prime is 640251142291. The next prime is 640251142339. The reversal of 640251142310 is 13241152046.

It is a super-2 number, since 2×640251142310² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 52387601 + ... + 52399820.

It is an arithmetic number, because the mean of its divisors is an integer number (39609645516).

Almost surely, 2^640251142310 is an apocalyptic number.

640251142310 is a deficient number, since it is larger than the sum of its proper divisors (627257514202).

640251142310 is a wasteful number, since it uses less digits than its factorization.

640251142310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104787488.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 640251142310 its reverse (13241152046), we get a palindrome (653492294356).

The spelling of 640251142310 in words is "six hundred forty billion, two hundred fifty-one million, one hundred forty-two thousand, three hundred ten".