1531401380651 has 2 divisors, whose sum is σ = 1531401380652. Its totient is φ = 1531401380650.

The previous prime is 1531401380627. The next prime is 1531401380693. The reversal of 1531401380651 is 1560831041351.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1531401380651 is a prime.

It is not a weakly prime, because it can be changed into another prime (1531401380251) by changing a digit.

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 as a sum of consecutive naturals, namely, 765700690325 + 765700690326.

It is an arithmetic number, because the mean of its divisors is an integer number (765700690326).

Almost surely, 2^{1531401380651} is an apocalyptic number.

1531401380651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531401380651 is an equidigital number, since it uses as much as digits as its factorization.

1531401380651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 1531401380651 in words is "one trillion, five hundred thirty-one billion, four hundred one million, three hundred eighty thousand, six hundred fifty-one".