640620152610 has 96 divisors (see below), whose sum is σ = 1607221766592. Its totient is φ = 163399084800.

The previous prime is 640620152609. The next prime is 640620152707. The reversal of 640620152610 is 16251026046.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2580960 + ... + 2818260.

It is an arithmetic number, because the mean of its divisors is an integer number (16741893402).

Almost surely, 2^640620152610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640620152610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (803610883296).

640620152610 is an abundant number, since it is smaller than the sum of its proper divisors (966601613982).

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

640620152610 is a wasteful number, since it uses less digits than its factorization.

640620152610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237476 (or 237447 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 640620152610 its reverse (16251026046), we get a palindrome (656871178656).

The spelling of 640620152610 in words is "six hundred forty billion, six hundred twenty million, one hundred fifty-two thousand, six hundred ten".