640141621130 has 64 divisors (see below), whose sum is σ = 1324744243200. Its totient is φ = 220263808320.

The previous prime is 640141621127. The next prime is 640141621237. The reversal of 640141621130 is 31126141046.

It is a junction number, because it is equal to n+sod(n) for n = 640141621093 and 640141621102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1570979 + ... + 1936041.

It is an arithmetic number, because the mean of its divisors is an integer number (20699128800).

Almost surely, 2^640141621130 is an apocalyptic number.

640141621130 is an abundant number, since it is smaller than the sum of its proper divisors (684602622070).

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

640141621130 is a wasteful number, since it uses less digits than its factorization.

640141621130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365939.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 640141621130 its reverse (31126141046), we get a palindrome (671267762176).

The spelling of 640141621130 in words is "six hundred forty billion, one hundred forty-one million, six hundred twenty-one thousand, one hundred thirty".