1351799203508 has 24 divisors (see below), whose sum is σ = 2550256232832. Its totient is φ = 623262102624.

The previous prime is 1351799203493. The next prime is 1351799203529. The reversal of 1351799203508 is 8053029971531.

It is a super-2 number, since 2×1351799203508² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1351799203508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13391360 + ... + 13491927.

It is an arithmetic number, because the mean of its divisors is an integer number (106260676368).

Almost surely, 2^{1351799203508} is an apocalyptic number.

It is an amenable number.

1351799203508 is a deficient number, since it is larger than the sum of its proper divisors (1198457029324).

1351799203508 is a wasteful number, since it uses less digits than its factorization.

1351799203508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26884271 (or 26884269 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 53.

Adding to 1351799203508 its sum of digits (53), we get a square (1351799203561 = 1162669²).

The spelling of 1351799203508 in words is "one trillion, three hundred fifty-one billion, seven hundred ninety-nine million, two hundred three thousand, five hundred eight".