640062553 has 8 divisors (see below), whose sum is σ = 696124296. Its totient is φ = 584976000.

The previous prime is 640062547. The next prime is 640062559. The reversal of 640062553 is 355260046.

It is an interprime number because it is at equal distance from previous prime (640062547) and next prime (640062559).

It can be written as a sum of positive squares in 4 ways, for example, as 290634304 + 349428249 = 17048^2 + 18693^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 640062553 - 2⁹ = 640062041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640062559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242428 + ... + 245053.

It is an arithmetic number, because the mean of its divisors is an integer number (87015537).

Almost surely, 2^640062553 is an apocalyptic number.

It is an amenable number.

640062553 is a deficient number, since it is larger than the sum of its proper divisors (56061743).

640062553 is a wasteful number, since it uses less digits than its factorization.

640062553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487595.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 640062553 is about 25299.4575633550. The cubic root of 640062553 is about 861.8019514217.

The spelling of 640062553 in words is "six hundred forty million, sixty-two thousand, five hundred fifty-three".