3961493204820 has 24 divisors (see below), whose sum is σ = 11092180973664. Its totient is φ = 1056398187936.

The previous prime is 3961493204813. The next prime is 3961493204827. The reversal of 3961493204820 is 284023941693.

It is an interprime number because it is at equal distance from previous prime (3961493204813) and next prime (3961493204827).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3961493204827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33012443314 + ... + 33012443433.

It is an arithmetic number, because the mean of its divisors is an integer number (462174207236).

Almost surely, 2^{3961493204820} is an apocalyptic number.

3961493204820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3961493204820 is an abundant number, since it is smaller than the sum of its proper divisors (7130687768844).

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

3961493204820 is a wasteful number, since it uses less digits than its factorization.

3961493204820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66024886759 (or 66024886757 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 3961493204820 in words is "three trillion, nine hundred sixty-one billion, four hundred ninety-three million, two hundred four thousand, eight hundred twenty".