1351326550640 has 40 divisors (see below), whose sum is σ = 3427455526128. Its totient is φ = 491391472640.

The previous prime is 1351326550631. The next prime is 1351326550669. The reversal of 1351326550640 is 460556231531.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 767798297 + ... + 767800056.

Almost surely, 2^{1351326550640} is an apocalyptic number.

1351326550640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1351326550640 is an abundant number, since it is smaller than the sum of its proper divisors (2076128975488).

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

1351326550640 is a wasteful number, since it uses less digits than its factorization.

1351326550640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535598377 (or 1535598371 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 1351326550640 in words is "one trillion, three hundred fifty-one billion, three hundred twenty-six million, five hundred fifty thousand, six hundred forty".