326200787640 has 384 divisors, whose sum is σ = 1307140248960. Its totient is φ = 68701519872.

The previous prime is 326200787617. The next prime is 326200787663. The reversal of 326200787640 is 46787002623.

326200787640 is a `hidden beast` number, since 326 + 200 + 7 + 87 + 6 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (326200787617) and next prime (326200787663).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18893892 + ... + 18911148.

It is an arithmetic number, because the mean of its divisors is an integer number (3404011065).

Almost surely, 2^326200787640 is an apocalyptic number.

326200787640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 326200787640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (653570124480).

326200787640 is an abundant number, since it is smaller than the sum of its proper divisors (980939461320).

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

326200787640 is a wasteful number, since it uses less digits than its factorization.

326200787640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17871 (or 17864 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 326200787640 in words is "three hundred twenty-six billion, two hundred million, seven hundred eighty-seven thousand, six hundred forty".