640100037641 has 16 divisors (see below), whose sum is σ = 676379066880. Its totient is φ = 604809192960.

The previous prime is 640100037617. The next prime is 640100037649. The reversal of 640100037641 is 146730001046.

It is a cyclic number.

It is not a de Polignac number, because 640100037641 - 2²² = 640095843337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 640100037598 and 640100037607.

It is not an unprimeable number, because it can be changed into a prime (640100037649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3363875 + ... + 3549063.

It is an arithmetic number, because the mean of its divisors is an integer number (42273691680).

Almost surely, 2^640100037641 is an apocalyptic number.

It is an amenable number.

640100037641 is a deficient number, since it is larger than the sum of its proper divisors (36279029239).

640100037641 is a wasteful number, since it uses less digits than its factorization.

640100037641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187856.

The product of its (nonzero) digits is 12096, while the sum is 32.

Adding to 640100037641 its reverse (146730001046), we get a palindrome (786830038687).

The spelling of 640100037641 in words is "six hundred forty billion, one hundred million, thirty-seven thousand, six hundred forty-one".