640612262 has 8 divisors (see below), whose sum is σ = 994053600. Its totient is φ = 309261064.

The previous prime is 640612213. The next prime is 640612267. The reversal of 640612262 is 262216046.

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

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640612267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5522462 + ... + 5522577.

It is an arithmetic number, because the mean of its divisors is an integer number (124256700).

Almost surely, 2^640612262 is an apocalyptic number.

640612262 is a deficient number, since it is larger than the sum of its proper divisors (353441338).

640612262 is a wasteful number, since it uses less digits than its factorization.

640612262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11045070.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 640612262 is about 25310.3192789028. The cubic root of 640612262 is about 862.0485964459.

The spelling of 640612262 in words is "six hundred forty million, six hundred twelve thousand, two hundred sixty-two".