640235156013052 has 12 divisors (see below), whose sum is σ = 1120559159328840. Its totient is φ = 320075396204816.

The previous prime is 640235156013049. The next prime is 640235156013067. The reversal of 640235156013052 is 250310651532046.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10545416278 + ... + 10545476989.

It is an arithmetic number, because the mean of its divisors is an integer number (93379929944070).

Almost surely, 2^{640235156013052} is an apocalyptic number.

It is an amenable number.

640235156013052 is a deficient number, since it is larger than the sum of its proper divisors (480324003315788).

640235156013052 is a wasteful number, since it uses less digits than its factorization.

640235156013052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21090900860 (or 21090900858 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 640235156013052 in words is "six hundred forty trillion, two hundred thirty-five billion, one hundred fifty-six million, thirteen thousand, fifty-two".