1640063755652 has 24 divisors (see below), whose sum is σ = 3311973415296. Its totient is φ = 696060344448.

The previous prime is 1640063755651. The next prime is 1640063755691. The reversal of 1640063755652 is 2565573600461.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1640063755652.

It is not an unprimeable number, because it can be changed into a prime (1640063755651) 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, 284335493 + ... + 284341260.

It is an arithmetic number, because the mean of its divisors is an integer number (137998892304).

Almost surely, 2^{1640063755652} is an apocalyptic number.

It is an amenable number.

1640063755652 is an abundant number, since it is smaller than the sum of its proper divisors (1671909659644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1640063755652 is a wasteful number, since it uses less digits than its factorization.

1640063755652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568676867 (or 568676865 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 50.

The spelling of 1640063755652 in words is "one trillion, six hundred forty billion, sixty-three million, seven hundred fifty-five thousand, six hundred fifty-two".