640541065032 has 96 divisors (see below), whose sum is σ = 1892683260000. Its totient is φ = 194085346560.

The previous prime is 640541064979. The next prime is 640541065037. The reversal of 640541065032 is 230560145046.

640541065032 is a `hidden beast` number, since 6 + 40 + 5 + 4 + 106 + 503 + 2 = 666.

640541065032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×640541065032² (a number of 24 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (640541065037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10303819 + ... + 10365797.

It is an arithmetic number, because the mean of its divisors is an integer number (19715450625).

Almost surely, 2^640541065032 is an apocalyptic number.

It is an amenable number.

640541065032 is an abundant number, since it is smaller than the sum of its proper divisors (1252142194968).

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

640541065032 is a wasteful number, since it uses less digits than its factorization.

640541065032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75051 (or 75044 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 640541065032 in words is "six hundred forty billion, five hundred forty-one million, sixty-five thousand, thirty-two".