1331961841530 has 48 divisors (see below), whose sum is σ = 3556698115464. Its totient is φ = 345590098560.

The previous prime is 1331961841513. The next prime is 1331961841531. The reversal of 1331961841530 is 351481691331.

1331961841530 is a `hidden beast` number, since 1 + 3 + 3 + 19 + 61 + 8 + 41 + 530 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1315592942049 + 16368899481 = 1146993^2 + 127941^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1331961841531) 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 23 ways as a sum of consecutive naturals, for example, 199990941 + ... + 199997600.

Almost surely, 2^{1331961841530} is an apocalyptic number.

1331961841530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1331961841530 is an abundant number, since it is smaller than the sum of its proper divisors (2224736273934).

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

1331961841530 is a wasteful number, since it uses less digits than its factorization.

1331961841530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399988591 (or 399988588 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 1331961841530 in words is "one trillion, three hundred thirty-one billion, nine hundred sixty-one million, eight hundred forty-one thousand, five hundred thirty".