40642443264 has 96 divisors (see below), whose sum is σ = 110996842320. Its totient is φ = 13216972800.

The previous prime is 40642443197. The next prime is 40642443299. The reversal of 40642443264 is 46234424604.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171234 + ... + 332574.

Almost surely, 2^40642443264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40642443264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55498421160).

40642443264 is an abundant number, since it is smaller than the sum of its proper divisors (70354399056).

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

40642443264 is a wasteful number, since it uses less digits than its factorization.

40642443264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161407 (or 161387 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 39.

Adding to 40642443264 its reverse (46234424604), we get a palindrome (86876867868).

The spelling of 40642443264 in words is "forty billion, six hundred forty-two million, four hundred forty-three thousand, two hundred sixty-four".