640201136652 has 144 divisors (see below), whose sum is σ = 2017905926400. Its totient is φ = 166261092480.

The previous prime is 640201136633. The next prime is 640201136671. The reversal of 640201136652 is 256631102046.

640201136652 is a `hidden beast` number, since 6 + 40 + 201 + 1 + 366 + 52 = 666.

It is an interprime number because it is at equal distance from previous prime (640201136633) and next prime (640201136671).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 25015599 + ... + 25041177.

It is an arithmetic number, because the mean of its divisors is an integer number (14013235600).

Almost surely, 2^640201136652 is an apocalyptic number.

It is an amenable number.

640201136652 is an abundant number, since it is smaller than the sum of its proper divisors (1377704789748).

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

640201136652 is a wasteful number, since it uses less digits than its factorization.

640201136652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34636 (or 34631 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 640201136652 its reverse (256631102046), we get a palindrome (896832238698).

The spelling of 640201136652 in words is "six hundred forty billion, two hundred one million, one hundred thirty-six thousand, six hundred fifty-two".