640630150 has 24 divisors (see below), whose sum is σ = 1200157560. Its totient is φ = 254405760.

The previous prime is 640630147. The next prime is 640630171. The reversal of 640630150 is 51036046.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39139 + ... + 53038.

It is an arithmetic number, because the mean of its divisors is an integer number (50006565).

Almost surely, 2^640630150 is an apocalyptic number.

640630150 is a deficient number, since it is larger than the sum of its proper divisors (559527410).

640630150 is a wasteful number, since it uses less digits than its factorization.

640630150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92328 (or 92323 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 640630150 is about 25310.6726500897. The cubic root of 640630150 is about 862.0566201147.

Adding to 640630150 its reverse (51036046), we get a palindrome (691666196).

The spelling of 640630150 in words is "six hundred forty million, six hundred thirty thousand, one hundred fifty".