1331395650 has 192 divisors, whose sum is σ = 3993494400. Its totient is φ = 324207360.

The previous prime is 1331395603. The next prime is 1331395661. The reversal of 1331395650 is 565931331.

It is a super-2 number, since 2×1331395650² = 3545228753677845000, which 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 95 ways as a sum of consecutive naturals, for example, 1877496 + ... + 1878204.

It is an arithmetic number, because the mean of its divisors is an integer number (20799450).

Almost surely, 2^1331395650 is an apocalyptic number.

1331395650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331395650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1996747200).

1331395650 is an abundant number, since it is smaller than the sum of its proper divisors (2662098750).

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

1331395650 is a wasteful number, since it uses less digits than its factorization.

1331395650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850 (or 839 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 36.

The square root of 1331395650 is about 36488.2946984372. The cubic root of 1331395650 is about 1100.1089836923.

The spelling of 1331395650 in words is "one billion, three hundred thirty-one million, three hundred ninety-five thousand, six hundred fifty".