640465135030 has 32 divisors (see below), whose sum is σ = 1333402124544. Its totient is φ = 216942405216.

The previous prime is 640465134977. The next prime is 640465135039. The reversal of 640465135030 is 30531564046.

It is a super-2 number, since 2×640465135030² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640465135039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55111672 + ... + 55123291.

It is an arithmetic number, because the mean of its divisors is an integer number (41668816392).

Almost surely, 2^640465135030 is an apocalyptic number.

640465135030 is an abundant number, since it is smaller than the sum of its proper divisors (692936989514).

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

640465135030 is a wasteful number, since it uses less digits than its factorization.

640465135030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110235060.

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 640465135030 its reverse (30531564046), we get a palindrome (670996699076).

The spelling of 640465135030 in words is "six hundred forty billion, four hundred sixty-five million, one hundred thirty-five thousand, thirty".