326436141663440 has 40 divisors (see below), whose sum is σ = 759134545591968. Its totient is φ = 130545120540800.

The previous prime is 326436141663397. The next prime is 326436141663461. The reversal of 326436141663440 is 44366141634623.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×326436141663440² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458018642 + ... + 458730801.

Almost surely, 2^{326436141663440} is an apocalyptic number.

It is an amenable number.

326436141663440 is an abundant number, since it is smaller than the sum of its proper divisors (432698403928528).

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

326436141663440 is a wasteful number, since it uses less digits than its factorization.

326436141663440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916753907 (or 916753901 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 53.

The spelling of 326436141663440 in words is "three hundred twenty-six trillion, four hundred thirty-six billion, one hundred forty-one million, six hundred sixty-three thousand, four hundred forty".