326690691642 has 128 divisors (see below), whose sum is σ = 856929093120. Its totient is φ = 90324149760.

The previous prime is 326690691583. The next prime is 326690691647. The reversal of 326690691642 is 246196096623.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (326690691647) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1350792 + ... + 1574172.

It is an arithmetic number, because the mean of its divisors is an integer number (6694758540).

Almost surely, 2^326690691642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 326690691642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428464546560).

326690691642 is an abundant number, since it is smaller than the sum of its proper divisors (530238401478).

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

326690691642 is a wasteful number, since it uses less digits than its factorization.

326690691642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223525 (or 223519 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 54.

The spelling of 326690691642 in words is "three hundred twenty-six billion, six hundred ninety million, six hundred ninety-one thousand, six hundred forty-two".