6401042513564 has 12 divisors (see below), whose sum is σ = 11588094205800. Its totient is φ = 3090158454768.

The previous prime is 6401042513561. The next prime is 6401042513599. The reversal of 6401042513564 is 4653152401046.

It is a super-2 number, since 2×6401042513564² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401042513561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27590700374 + ... + 27590700605.

It is an arithmetic number, because the mean of its divisors is an integer number (965674517150).

Almost surely, 2^{6401042513564} is an apocalyptic number.

It is an amenable number.

6401042513564 is a deficient number, since it is larger than the sum of its proper divisors (5187051692236).

6401042513564 is a wasteful number, since it uses less digits than its factorization.

6401042513564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55181401012 (or 55181401010 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 6401042513564 in words is "six trillion, four hundred one billion, forty-two million, five hundred thirteen thousand, five hundred sixty-four".