640516133342 has 4 divisors (see below), whose sum is σ = 960774200016. Its totient is φ = 320258066670.

The previous prime is 640516133321. The next prime is 640516133401. The reversal of 640516133342 is 243331615046.

640516133342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 640516133296 and 640516133305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160129033334 + ... + 160129033337.

It is an arithmetic number, because the mean of its divisors is an integer number (240193550004).

Almost surely, 2^640516133342 is an apocalyptic number.

640516133342 is a deficient number, since it is larger than the sum of its proper divisors (320258066674).

640516133342 is a wasteful number, since it uses less digits than its factorization.

640516133342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320258066673.

The product of its (nonzero) digits is 155520, while the sum is 38.

Adding to 640516133342 its reverse (243331615046), we get a palindrome (883847748388).

The spelling of 640516133342 in words is "six hundred forty billion, five hundred sixteen million, one hundred thirty-three thousand, three hundred forty-two".