640841480370840 has 64 divisors (see below), whose sum is σ = 2197170789845760. Its totient is φ = 146478052656000.

The previous prime is 640841480370799. The next prime is 640841480370863. The reversal of 640841480370840 is 48073084148046.

640841480370840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 381453261286 + ... + 381453262965.

It is an arithmetic number, because the mean of its divisors is an integer number (34330793591340).

Almost surely, 2^{640841480370840} is an apocalyptic number.

640841480370840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

640841480370840 is an abundant number, since it is smaller than the sum of its proper divisors (1556329309474920).

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

640841480370840 is a wasteful number, since it uses less digits than its factorization.

640841480370840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762906524272 (or 762906524268 counting only the distinct ones).

The product of its (nonzero) digits is 16515072, while the sum is 57.

The spelling of 640841480370840 in words is "six hundred forty trillion, eight hundred forty-one billion, four hundred eighty million, three hundred seventy thousand, eight hundred forty".