640126241645 has 32 divisors (see below), whose sum is σ = 846944968320. Its totient is φ = 460594167040.

The previous prime is 640126241611. The next prime is 640126241717. The reversal of 640126241645 is 546142621046.

It is a de Polignac number, because none of the positive numbers 2^k-640126241645 is a prime.

It is a super-3 number, since 3×640126241645³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1774439 + ... + 2104491.

It is an arithmetic number, because the mean of its divisors is an integer number (26467030260).

Almost surely, 2^640126241645 is an apocalyptic number.

It is an amenable number.

640126241645 is a deficient number, since it is larger than the sum of its proper divisors (206818726675).

640126241645 is a wasteful number, since it uses less digits than its factorization.

640126241645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330445.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 640126241645 in words is "six hundred forty billion, one hundred twenty-six million, two hundred forty-one thousand, six hundred forty-five".