1351215661451 has 4 divisors (see below), whose sum is σ = 1430698935672. Its totient is φ = 1271732387232.

The previous prime is 1351215661379. The next prime is 1351215661457. The reversal of 1351215661451 is 1541665121531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1351215661451 - 2¹⁸ = 1351215399307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1351215661399 and 1351215661408.

It is not an unprimeable number, because it can be changed into a prime (1351215661457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39741637085 + ... + 39741637118.

It is an arithmetic number, because the mean of its divisors is an integer number (357674733918).

Almost surely, 2^{1351215661451} is an apocalyptic number.

1351215661451 is a deficient number, since it is larger than the sum of its proper divisors (79483274221).

1351215661451 is an equidigital number, since it uses as much as digits as its factorization.

1351215661451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79483274220.

The product of its digits is 108000, while the sum is 41.

The spelling of 1351215661451 in words is "one trillion, three hundred fifty-one billion, two hundred fifteen million, six hundred sixty-one thousand, four hundred fifty-one".