1351578779508 has 48 divisors (see below), whose sum is σ = 3261367445504. Its totient is φ = 435196026720.

The previous prime is 1351578779497. The next prime is 1351578779531. The reversal of 1351578779508 is 8059778751531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3117610 + ... + 3524577.

Almost surely, 2^{1351578779508} is an apocalyptic number.

It is an amenable number.

1351578779508 is an abundant number, since it is smaller than the sum of its proper divisors (1909788665996).

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

1351578779508 is a wasteful number, since it uses less digits than its factorization.

1351578779508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6642772 (or 6642770 counting only the distinct ones).

The product of its (nonzero) digits is 74088000, while the sum is 66.

The spelling of 1351578779508 in words is "one trillion, three hundred fifty-one billion, five hundred seventy-eight million, seven hundred seventy-nine thousand, five hundred eight".