3206730191640 has 256 divisors, whose sum is σ = 10042798089600. Its totient is φ = 818123636736.

The previous prime is 3206730191549. The next prime is 3206730191641. The reversal of 3206730191640 is 461910376023.

It is a super-2 number, since 2×3206730191640² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3206730191592 and 3206730191601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3206730191641) 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, 275084692 + ... + 275096348.

Almost surely, 2^{3206730191640} is an apocalyptic number.

3206730191640 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 3206730191640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5021399044800).

3206730191640 is an abundant number, since it is smaller than the sum of its proper divisors (6836067897960).

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

3206730191640 is a wasteful number, since it uses less digits than its factorization.

3206730191640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12414 (or 12410 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 42.

The spelling of 3206730191640 in words is "three trillion, two hundred six billion, seven hundred thirty million, one hundred ninety-one thousand, six hundred forty".