40323264642 has 80 divisors (see below), whose sum is σ = 92303073720. Its totient is φ = 13152492288.

The previous prime is 40323264593. The next prime is 40323264643. The reversal of 40323264642 is 24646232304.

40323264642 is a `hidden beast` number, since 4 + 0 + 3 + 2 + 3 + 2 + 6 + 4 + 642 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 22022856801 + 18300407841 = 148401^2 + 135279^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40323264597 and 40323264606.

It is not an unprimeable number, because it can be changed into a prime (40323264643) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3333918 + ... + 3345990.

Almost surely, 2^40323264642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40323264642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46151536860).

40323264642 is an abundant number, since it is smaller than the sum of its proper divisors (51979809078).

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

40323264642 is a wasteful number, since it uses less digits than its factorization.

40323264642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12529 (or 12520 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 36.

Adding to 40323264642 its reverse (24646232304), we get a palindrome (64969496946).

The spelling of 40323264642 in words is "forty billion, three hundred twenty-three million, two hundred sixty-four thousand, six hundred forty-two".