640362255 has 16 divisors (see below), whose sum is σ = 1103393760. Its totient is φ = 315255168.

The previous prime is 640362241. The next prime is 640362269. The reversal of 640362255 is 552263046.

640362255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (640362241) and next prime (640362269).

It is not a de Polignac number, because 640362255 - 2⁷ = 640362127 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1641760 + ... + 1642149.

It is an arithmetic number, because the mean of its divisors is an integer number (68962110).

Almost surely, 2^640362255 is an apocalyptic number.

640362255 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

640362255 is a deficient number, since it is larger than the sum of its proper divisors (463031505).

640362255 is a wasteful number, since it uses less digits than its factorization.

640362255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283930.

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 640362255 is about 25305.3799615813. The cubic root of 640362255 is about 861.9364400821.

The spelling of 640362255 in words is "six hundred forty million, three hundred sixty-two thousand, two hundred fifty-five".