640013011953 has 8 divisors (see below), whose sum is σ = 975257923008. Its totient is φ = 365721721104.

The previous prime is 640013011933. The next prime is 640013011991. The reversal of 640013011953 is 359110310046.

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

It is not a de Polignac number, because 640013011953 - 2⁵ = 640013011921 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (640013011933) 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, 15238405026 + ... + 15238405067.

It is an arithmetic number, because the mean of its divisors is an integer number (121907240376).

Almost surely, 2^640013011953 is an apocalyptic number.

It is an amenable number.

640013011953 is a deficient number, since it is larger than the sum of its proper divisors (335244911055).

640013011953 is a wasteful number, since it uses less digits than its factorization.

640013011953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30476810103.

The product of its (nonzero) digits is 9720, while the sum is 33.

Adding to 640013011953 its reverse (359110310046), we get a palindrome (999123321999).

The spelling of 640013011953 in words is "six hundred forty billion, thirteen million, eleven thousand, nine hundred fifty-three".